Fix tests on older ZSH versions

23 files changed, 227 insertions, 132 deletions

diff --git a/test/segments/anaconda.spec b/test/segments/anaconda.spec
index 11add849..da87c096 100755
--- a/test/segments/anaconda.spec
+++ b/test/segments/anaconda.spec
@@ -13,7 +13,8 @@ function setUp() {
 
 function testAnacondaSegmentPrintsNothingIfNoAnacondaPathIsSet() {
     local POWERLEVEL9K_CUSTOM_WORLD='echo world'
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(anaconda custom_world)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(anaconda custom_world)
     # Unset anacona variables
     unset CONDA_ENV_PATH
     unset CONDA_PREFIX
@@ -24,7 +25,8 @@ function testAnacondaSegmentPrintsNothingIfNoAnacondaPathIsSet() {
 function testAnacondaSegmentWorksIfOnlyAnacondaPathIsSet() {
     CONDA_ENV_PATH=/tmp
     unset CONDA_PREFIX
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(anaconda)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(anaconda)
     local POWERLEVEL9K_PYTHON_ICON="icon-here"
 
     assertEquals "%K{blue} %F{black%}icon-here %f%F{black}(tmp) %k%F{blue}%f " "$(build_left_prompt)"
@@ -33,7 +35,8 @@ function testAnacondaSegmentWorksIfOnlyAnacondaPathIsSet() {
 function testAnacondaSegmentWorksIfOnlyAnacondaPrefixIsSet() {
     unset CONDA_ENV_PATH
     local CONDA_PREFIX="test"
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(anaconda)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(anaconda)
     local POWERLEVEL9K_PYTHON_ICON="icon-here"
 
     assertEquals "%K{blue} %F{black%}icon-here %f%F{black}(test) %k%F{blue}%f " "$(build_left_prompt)"
@@ -42,7 +45,8 @@ function testAnacondaSegmentWorksIfOnlyAnacondaPrefixIsSet() {
 function testAnacondaSegmentWorks() {
     local CONDA_ENV_PATH=/tmp
     local CONDA_PREFIX="test"
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(anaconda)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(anaconda)
     local POWERLEVEL9K_PYTHON_ICON="icon-here"
 
     assertEquals "%K{blue} %F{black%}icon-here %f%F{black}(tmptest) %k%F{blue}%f " "$(build_left_prompt)"
diff --git a/test/segments/aws_eb_env.spec b/test/segments/aws_eb_env.spec
index 530da6a1..56042027 100755
--- a/test/segments/aws_eb_env.spec
+++ b/test/segments/aws_eb_env.spec
@@ -23,7 +23,7 @@ function testAwsEbEnvSegmentWorksIfElasticBeanstalkEnvironmentIsSet() {
     echo "test:\n    environment: test" > /tmp/powerlevel9k-test/.elasticbeanstalk/config.yml
     cd /tmp/powerlevel9k-test
 
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(aws_eb_env)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(aws_eb_env)
 
     assertEquals "%K{black} %F{green%}🌱  %f%F{green}test %k%F{black}%f " "$(build_left_prompt)"
 
@@ -40,7 +40,8 @@ function testAwsEbEnvSegmentWorksIfElasticBeanstalkEnvironmentIsSetInParentDirec
     echo "test:\n    environment: test" > /tmp/powerlevel9k-test/.elasticbeanstalk/config.yml
     cd /tmp/powerlevel9k-test/1/12/123/1234/12345
 
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(aws_eb_env)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(aws_eb_env)
 
     assertEquals "%K{black} %F{green%}🌱  %f%F{green}test %k%F{black}%f " "$(build_left_prompt)"
 
diff --git a/test/segments/background_jobs.spec b/test/segments/background_jobs.spec
index 9f866ff0..5a000b66 100755
--- a/test/segments/background_jobs.spec
+++ b/test/segments/background_jobs.spec
@@ -13,7 +13,8 @@ function setUp() {
 
 function testBackgroundJobsSegmentPrintsNothingWithoutBackgroundJobs() {
     local POWERLEVEL9K_CUSTOM_WORLD='echo world'
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(background_jobs custom_world)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(background_jobs custom_world)
     alias jobs="nojobs 2>/dev/null"
 
     assertEquals "%K{white} %F{black}world %k%F{white}%f " "$(build_left_prompt)"
@@ -23,7 +24,8 @@ function testBackgroundJobsSegmentPrintsNothingWithoutBackgroundJobs() {
 
 function testBackgroundJobsSegmentWorksWithOneBackgroundJob() {
     unset POWERLEVEL9K_BACKGROUND_JOBS_VERBOSE
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(background_jobs)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(background_jobs)
     jobs() {
         echo '[1]  + 30444 suspended  nvim xx'
     }
@@ -35,7 +37,8 @@ function testBackgroundJobsSegmentWorksWithOneBackgroundJob() {
 
 function testBackgroundJobsSegmentWorksWithMultipleBackgroundJobs() {
     unset POWERLEVEL9K_BACKGROUND_JOBS_VERBOSE
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(background_jobs)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(background_jobs)
     jobs() {
         echo "[1]    31190 suspended  nvim xx"
         echo "[2]  - 31194 suspended  nvim xx2"
@@ -49,7 +52,8 @@ function testBackgroundJobsSegmentWorksWithMultipleBackgroundJobs() {
 
 function testBackgroundJobsSegmentWithVerboseMode() {
     local POWERLEVEL9K_BACKGROUND_JOBS_VERBOSE=true
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(background_jobs)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(background_jobs)
     jobs() {
         echo "[1]    31190 suspended  nvim xx"
         echo "[2]  - 31194 suspended  nvim xx2"
diff --git a/test/segments/battery.spec b/test/segments/battery.spec
index 808ecc6a..e49c3b34 100755
--- a/test/segments/battery.spec
+++ b/test/segments/battery.spec
@@ -65,7 +65,6 @@ function makeBatterySay() {
 
 function testBatterySegmentIfBatteryIsLowWhileDischargingOnOSX() {
   local OS='OSX' # Fake OSX
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(battery)
   makeBatterySay "Now drawing from 'Battery Power'
  -InternalBattery-0 (id=1234567)	4%; discharging; 0:05 remaining present: true"
 
@@ -74,7 +73,6 @@ function testBatterySegmentIfBatteryIsLowWhileDischargingOnOSX() {
 
 function testBatterySegmentIfBatteryIsLowWhileChargingOnOSX() {
   local OS='OSX' # Fake OSX
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(battery)
   makeBatterySay "Now drawing from 'Battery Power'
  -InternalBattery-0 (id=1234567)	4%; charging; 0:05 remaining present: true"
 
@@ -83,7 +81,6 @@ function testBatterySegmentIfBatteryIsLowWhileChargingOnOSX() {
 
 function testBatterySegmentIfBatteryIsAlmostFullWhileDischargingOnOSX() {
   local OS='OSX' # Fake OSX
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(battery)
   makeBatterySay "Now drawing from 'Battery Power'
  -InternalBattery-0 (id=1234567)	98%; discharging; 3:57 remaining present: true"
 
@@ -92,7 +89,6 @@ function testBatterySegmentIfBatteryIsAlmostFullWhileDischargingOnOSX() {
 
 function testBatterySegmentIfBatteryIsAlmostFullWhileChargingOnOSX() {
   local OS='OSX' # Fake OSX
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(battery)
   makeBatterySay "Now drawing from 'Battery Power'
  -InternalBattery-0 (id=1234567)	98%; charging; 3:57 remaining present: true"
 
@@ -109,7 +105,6 @@ function testBatterySegmentIfBatteryIsFullOnOSX() {
 
 function testBatterySegmentIfBatteryIsCalculatingOnOSX() {
   local OS='OSX' # Fake OSX
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(battery)
   makeBatterySay "Now drawing from 'Battery Power'
  -InternalBattery-0 (id=1234567)	99%; discharging; (no estimate) present: true"
 
@@ -118,7 +113,6 @@ function testBatterySegmentIfBatteryIsCalculatingOnOSX() {
 
 function testBatterySegmentIfBatteryIsLowWhileDischargingOnLinux() {
   local OS='Linux' # Fake Linux
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(battery)
   makeBatterySay "4" "Discharging"
 
   assertEquals "%K{black} %F{red%}🔋 %f%F{red}4%% " "$(prompt_battery left 1 false ${FOLDER})"
@@ -126,7 +120,6 @@ function testBatterySegmentIfBatteryIsLowWhileDischargingOnLinux() {
 
 function testBatterySegmentIfBatteryIsLowWhileChargingOnLinux() {
   local OS='Linux' # Fake Linux
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(battery)
   makeBatterySay "4" "Charging"
 
   assertEquals "%K{black} %F{yellow%}🔋 %f%F{yellow}4%% " "$(prompt_battery left 1 false ${FOLDER})"
@@ -134,7 +127,6 @@ function testBatterySegmentIfBatteryIsLowWhileChargingOnLinux() {
 
 function testBatterySegmentIfBatteryIsNormalWhileDischargingOnLinux() {
   local OS='Linux' # Fake Linux
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(battery)
   makeBatterySay "10" "Discharging"
 
   assertEquals "%K{black} %F{white%}🔋 %f%F{white}10%% " "$(prompt_battery left 1 false ${FOLDER})"
@@ -142,7 +134,6 @@ function testBatterySegmentIfBatteryIsNormalWhileDischargingOnLinux() {
 
 function testBatterySegmentIfBatteryIsNormalWhileChargingOnLinux() {
   local OS='Linux' # Fake Linux
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(battery)
   makeBatterySay "10" "Charging"
 
   assertEquals "%K{black} %F{yellow%}🔋 %f%F{yellow}10%% " "$(prompt_battery left 1 false ${FOLDER})"
@@ -150,7 +141,6 @@ function testBatterySegmentIfBatteryIsNormalWhileChargingOnLinux() {
 
 function testBatterySegmentIfBatteryIsFullOnLinux() {
   local OS='Linux' # Fake Linux
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(battery)
   makeBatterySay "100" "Full"
 
   assertEquals "%K{black} %F{green%}🔋 %f%F{green}100%% " "$(prompt_battery left 1 false ${FOLDER})"
@@ -158,7 +148,6 @@ function testBatterySegmentIfBatteryIsFullOnLinux() {
 
 function testBatterySegmentIfBatteryIsNormalWithAcpiEnabledOnLinux() {
   local OS='Linux' # Fake Linux
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(battery)
   makeBatterySay "50" "Discharging"
   echo "echo 'Batter 0: Discharging, 50%, 01:38:54 remaining'" > ${FOLDER}/usr/bin/acpi
   chmod +x ${FOLDER}/usr/bin/acpi
@@ -172,7 +161,6 @@ function testBatterySegmentIfBatteryIsNormalWithAcpiEnabledOnLinux() {
 
 function testBatterySegmentIfBatteryIsCalculatingWithAcpiEnabledOnLinux() {
   local OS='Linux' # Fake Linux
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(battery)
   makeBatterySay "50" "Discharging"
   # Todo: Include real acpi output!
   echo "echo 'Batter 0: Discharging, 50%, rate remaining'" > ${FOLDER}/usr/bin/acpi
diff --git a/test/segments/context.spec b/test/segments/context.spec
index e86bc357..702280df 100755
--- a/test/segments/context.spec
+++ b/test/segments/context.spec
@@ -23,41 +23,47 @@ function tearDown() {
 function testContextSegmentDoesNotGetRenderedWithDefaultUser() {
     local DEFAULT_USER=$(whoami)
     local POWERLEVEL9K_CUSTOM_WORLD='echo world'
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(context custom_world)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(context custom_world)
 
     assertEquals "%K{white} %F{black}world %k%F{white}%f " "$(build_left_prompt)"
 }
 
 function testContextSegmentDoesGetRenderedWhenSshConnectionIsOpen() {
     local SSH_CLIENT="putty"
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(context)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(context)
 
     assertEquals "%K{black} %F{yellow}%n@%m %k%F{black}%f " "$(build_left_prompt)"
 }
 
 function testContextSegmentWithForeignUser() {
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(context)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(context)
 
     assertEquals "%K{black} %F{yellow}%n@%m %k%F{black}%f " "$(build_left_prompt)"
 }
 
 # TODO: How to test root?
 function testContextSegmentWithRootUser() {
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(context)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(context)
     startSkipping # Skip test
 
     assertEquals "%K{black} %F{yellow}%n@%m %k%F{black}%f " "$(build_left_prompt)"
 }
 
 function testOverridingContextTemplate() {
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(context)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(context)
     local POWERLEVEL9K_CONTEXT_TEMPLATE=xx
 
     assertEquals "%K{black} %F{yellow}xx %k%F{black}%f " "$(build_left_prompt)"
 }
 
 function testContextSegmentIsShownIfDefaultUserIsSetWhenForced() {
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(context)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(context)
     local POWERLEVEL9K_ALWAYS_SHOW_CONTEXT=true
     local DEFAULT_USER=$(whoami)
 
@@ -65,7 +71,8 @@ function testContextSegmentIsShownIfDefaultUserIsSetWhenForced() {
 }
 
 function testContextSegmentIsShownIfForced() {
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(context)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(context)
     local POWERLEVEL9K_ALWAYS_SHOW_USER=true
     local DEFAULT_USER=$(whoami)
 
diff --git a/test/segments/custom.spec b/test/segments/custom.spec
index dea1577f..261e2508 100755
--- a/test/segments/custom.spec
+++ b/test/segments/custom.spec
@@ -12,14 +12,16 @@ function setUp() {
 }
 
 function testCustomDirectOutputSegment() {
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(custom_world)
     local POWERLEVEL9K_CUSTOM_WORLD="echo world"
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(custom_world)
 
     assertEquals "%K{white} %F{black}world %k%F{white}%f " "$(build_left_prompt)"
 }
 
 function testCustomClosureSegment() {
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(custom_world)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(custom_world)
     function p9k_hello_world() {
         echo "world"
     }
@@ -29,7 +31,8 @@ function testCustomClosureSegment() {
 }
 
 function testSettingBackgroundForCustomSegment() {
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(custom_world)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(custom_world)
     local POWERLEVEL9K_CUSTOM_WORLD="echo world"
     local POWERLEVEL9K_CUSTOM_WORLD_BACKGROUND="yellow"
 
@@ -37,7 +40,8 @@ function testSettingBackgroundForCustomSegment() {
 }
 
 function testSettingForegroundForCustomSegment() {
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(custom_world)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(custom_world)
     local POWERLEVEL9K_CUSTOM_WORLD="echo world"
     local POWERLEVEL9K_CUSTOM_WORLD_FOREGROUND="red"
 
@@ -45,7 +49,8 @@ function testSettingForegroundForCustomSegment() {
 }
 
 function testSettingVisualIdentifierForCustomSegment() {
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(custom_world)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(custom_world)
     local POWERLEVEL9K_CUSTOM_WORLD="echo world"
     local POWERLEVEL9K_CUSTOM_WORLD_ICON="hw"
 
@@ -53,7 +58,8 @@ function testSettingVisualIdentifierForCustomSegment() {
 }
 
 function testSettingVisualIdentifierForegroundColorForCustomSegment() {
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(custom_world)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(custom_world)
     local POWERLEVEL9K_CUSTOM_WORLD="echo world"
     local POWERLEVEL9K_CUSTOM_WORLD_ICON="hw"
     local POWERLEVEL9K_CUSTOM_WORLD_VISUAL_IDENTIFIER_COLOR="red"
diff --git a/test/segments/detect_virt.spec b/test/segments/detect_virt.spec
index efda6f43..f6cc2ee5 100755
--- a/test/segments/detect_virt.spec
+++ b/test/segments/detect_virt.spec
@@ -12,10 +12,11 @@ function setUp() {
 }
 
 function testDetectVirtSegmentPrintsNothingIfSystemdIsNotAvailable() {
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(detect_virt custom_world)
+    local POWERLEVEL9K_CUSTOM_WORLD='echo world'
     alias systemd-detect-virt="novirt"
 
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(detect_virt custom_world)
-    local POWERLEVEL9K_CUSTOM_WORLD='echo world'
 
     assertEquals "%K{white} %F{black}world %k%F{white}%f " "$(build_left_prompt)"
 
@@ -23,7 +24,8 @@ function testDetectVirtSegmentPrintsNothingIfSystemdIsNotAvailable() {
 }
 
 function testDetectVirtSegmentIfSystemdReturnsPlainName() {
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(detect_virt)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(detect_virt)
     alias systemd-detect-virt="echo 'xxx'"
 
     assertEquals "%K{black} %F{yellow}xxx %k%F{black}%f " "$(build_left_prompt)"
@@ -32,7 +34,8 @@ function testDetectVirtSegmentIfSystemdReturnsPlainName() {
 }
 
 function testDetectVirtSegmentIfRootFsIsOnExpectedInode() {
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(detect_virt)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(detect_virt)
     # Well. This is a weak test, as it fixates the implementation,
     # but it is necessary, as the implementation relys on the root
     # directory having the inode number "2"..
@@ -49,7 +52,8 @@ function testDetectVirtSegmentIfRootFsIsOnExpectedInode() {
 }
 
 function testDetectVirtSegmentIfRootFsIsNotOnExpectedInode() {
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(detect_virt)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(detect_virt)
     # Well. This is a weak test, as it fixates the implementation,
     # but it is necessary, as the implementation relys on the root
     # directory having the inode number "2"..
diff --git a/test/segments/disk_usage.spec b/test/segments/disk_usage.spec
index 574445d9..f6172c9f 100755
--- a/test/segments/disk_usage.spec
+++ b/test/segments/disk_usage.spec
@@ -32,11 +32,12 @@ function tearDown() {
 }
 
 function testDiskUsageSegmentWhenDiskIsAlmostFull() {
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(disk_usage)
   df() {
       echo "Filesystem     1K-blocks      Used Available Use% Mounted on
 /dev/disk1     487219288 471466944  15496344  97% /"
   }
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(disk_usage)
 
   assertEquals "%K{red} %F{white%}hdd  %f%F{white}97%% %k%F{red}%f " "$(build_left_prompt)"
 
@@ -44,11 +45,12 @@ function testDiskUsageSegmentWhenDiskIsAlmostFull() {
 }
 
 function testDiskUsageSegmentWhenDiskIsVeryFull() {
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(disk_usage)
   df() {
       echo "Filesystem     1K-blocks      Used Available Use% Mounted on
 /dev/disk1     487219288 471466944  15496344  94% /"
   }
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(disk_usage)
 
   assertEquals "%K{yellow} %F{black%}hdd  %f%F{black}94%% %k%F{yellow}%f " "$(build_left_prompt)"
 
@@ -56,11 +58,12 @@ function testDiskUsageSegmentWhenDiskIsVeryFull() {
 }
 
 function testDiskUsageSegmentWhenDiskIsQuiteEmpty() {
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(disk_usage)
   df() {
       echo "Filesystem     1K-blocks      Used Available Use% Mounted on
 /dev/disk1     487219288 471466944  15496344  4% /"
   }
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(disk_usage)
 
   assertEquals "%K{black} %F{yellow%}hdd  %f%F{yellow}4%% %k%F{black}%f " "$(build_left_prompt)"
 
@@ -68,12 +71,13 @@ function testDiskUsageSegmentWhenDiskIsQuiteEmpty() {
 }
 
 function testDiskUsageSegmentPrintsNothingIfDiskIsQuiteEmptyAndOnlyWarningsShouldBeDisplayed() {
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(disk_usage custom_world)
   df() {
       echo "Filesystem     1K-blocks      Used Available Use% Mounted on
 /dev/disk1     487219288 471466944  15496344  4% /"
   }
 
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(disk_usage custom_world)
   local POWERLEVEL9K_DISK_USAGE_ONLY_WARNING=true
   local POWERLEVEL9K_CUSTOM_WORLD='echo world'
 
@@ -83,11 +87,12 @@ function testDiskUsageSegmentPrintsNothingIfDiskIsQuiteEmptyAndOnlyWarningsShoul
 }
 
 function testDiskUsageSegmentWarningLevelCouldBeAdjusted() {
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(disk_usage)
   df() {
     echo "Filesystem     1K-blocks      Used Available Use% Mounted on
 /dev/disk1     487219288 471466944  15496344  11% /"
   }
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(disk_usage)
   local POWERLEVEL9K_DISK_USAGE_WARNING_LEVEL=10
 
   assertEquals "%K{yellow} %F{black%}hdd  %f%F{black}11%% %k%F{yellow}%f " "$(build_left_prompt)"
@@ -96,11 +101,12 @@ function testDiskUsageSegmentWarningLevelCouldBeAdjusted() {
 }
 
 function testDiskUsageSegmentCriticalLevelCouldBeAdjusted() {
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(disk_usage)
   df() {
     echo "Filesystem     1K-blocks      Used Available Use% Mounted on
 /dev/disk1     487219288 471466944  15496344  11% /"
   }
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(disk_usage)
   local POWERLEVEL9K_DISK_USAGE_WARNING_LEVEL=5
   local POWERLEVEL9K_DISK_USAGE_CRITICAL_LEVEL=10
 
diff --git a/test/segments/ip.spec b/test/segments/ip.spec
index 3ae2d389..0d07b6ee 100755
--- a/test/segments/ip.spec
+++ b/test/segments/ip.spec
@@ -12,8 +12,9 @@ function setUp() {
 }
 
 function testIpSegmentPrintsNothingOnOsxIfNotConnected() {
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(ip custom_world)
   alias networksetup='echo "not connected"'
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(ip custom_world)
   local OS="OSX" # Fake OSX
   local POWERLEVEL9K_CUSTOM_WORLD='echo world'
 
@@ -23,8 +24,9 @@ function testIpSegmentPrintsNothingOnOsxIfNotConnected() {
 }
 
 function testIpSegmentPrintsNothingOnLinuxIfNotConnected() {
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(ip custom_world)
   alias ip='echo "not connected"'
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(ip custom_world)
   local OS="Linux" # Fake Linux
   local POWERLEVEL9K_CUSTOM_WORLD='echo world'
 
@@ -34,7 +36,8 @@ function testIpSegmentPrintsNothingOnLinuxIfNotConnected() {
 }
 
 function testIpSegmentWorksOnOsxWithNoInterfaceSpecified() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(ip)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(ip)
   local OS='OSX' # Fake OSX
   alias networksetup="echo 'An asterisk (*) denotes that a network service is disabled.
 (1) Ethernet
@@ -69,7 +72,8 @@ function testIpSegmentWorksOnOsxWithNoInterfaceSpecified() {
 # in hierarchical order, but from outside this is not obvious
 # (implementation detail). So we need a test for this case.
 function testIpSegmentWorksOnOsxWithMultipleInterfacesSpecified() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(ip)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(ip)
   local OS='OSX' # Fake OSX
   alias networksetup="echo 'An asterisk (*) denotes that a network service is disabled.
 (1) Ethernet
@@ -116,7 +120,8 @@ function testIpSegmentWorksOnOsxWithMultipleInterfacesSpecified() {
 }
 
 function testIpSegmentWorksOnOsxWithInterfaceSpecified() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(ip)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(ip)
   local OS='OSX' # Fake OSX
   local POWERLEVEL9K_IP_INTERFACE='xxx'
   alias ipconfig="_(){ echo '1.2.3.4'; };_"
@@ -155,7 +160,8 @@ function testIpSegmentWorksOnLinuxWithNoInterfaceSpecified() {
 
 function testIpSegmentWorksOnLinuxWithMultipleInterfacesSpecified() {
     setopt aliases
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(ip)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(ip)
     local OS='Linux' # Fake Linux
     # That command is harder to test, as it is used at first
     # to get all relevant network interfaces and then for
@@ -185,7 +191,8 @@ function testIpSegmentWorksOnLinuxWithMultipleInterfacesSpecified() {
 }
 
 function testIpSegmentWorksOnLinuxWithInterfaceSpecified() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(ip)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(ip)
   local OS='Linux' # Fake Linux
   local POWERLEVEL9K_IP_INTERFACE='xxx'
   ip(){
diff --git a/test/segments/node_version.spec b/test/segments/node_version.spec
index 2fe3594e..b516e5ff 100755
--- a/test/segments/node_version.spec
+++ b/test/segments/node_version.spec
@@ -12,7 +12,8 @@ function setUp() {
 }
 
 function testNodeVersionSegmentPrintsNothingWithoutNode() {
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(node_version custom_world)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(node_version custom_world)
     local POWERLEVEL9K_CUSTOM_WORLD='echo world'
     alias node="nonode 2>/dev/null"
 
@@ -23,7 +24,8 @@ function testNodeVersionSegmentPrintsNothingWithoutNode() {
 }
 
 function testNodeVersionSegmentWorks() {
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(node_version)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(node_version)
     node() {
         echo "v1.2.3"
     }
diff --git a/test/segments/nodeenv.spec b/test/segments/nodeenv.spec
index bfa1d7fa..511a1a19 100755
--- a/test/segments/nodeenv.spec
+++ b/test/segments/nodeenv.spec
@@ -17,7 +17,8 @@ function setUp() {
 }
 
 function testNodeenvSegmentPrintsNothingWithoutNode() {
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(nodeenv custom_world)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(nodeenv custom_world)
     local POWERLEVEL9K_CUSTOM_WORLD='echo world'
     alias node="nonode 2>/dev/null"
 
@@ -27,7 +28,8 @@ function testNodeenvSegmentPrintsNothingWithoutNode() {
 }
 
 function testNodeenvSegmentPrintsNothingIfNodeVirtualEnvIsNotSet() {
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(nodeenv custom_world)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(nodeenv custom_world)
     local POWERLEVEL9K_CUSTOM_WORLD='echo world'
     node() {
         echo "v1.2.3"
@@ -39,7 +41,8 @@ function testNodeenvSegmentPrintsNothingIfNodeVirtualEnvIsNotSet() {
 }
 
 function testNodeenvSegmentPrintsNothingIfNodeVirtualEnvDisablePromptIsSet() {
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(nodeenv custom_world)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(nodeenv custom_world)
     local POWERLEVEL9K_CUSTOM_WORLD='echo world'
     node() {
         echo "v1.2.3"
@@ -55,7 +58,8 @@ function testNodeenvSegmentPrintsNothingIfNodeVirtualEnvDisablePromptIsSet() {
 }
 
 function testNodeenvSegmentPrintsAtLeastNodeEnvWithoutNode() {
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(nodeenv)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(nodeenv)
     alias node="nonode 2>/dev/null"
     NODE_VIRTUAL_ENV="node-env"
 
@@ -66,7 +70,8 @@ function testNodeenvSegmentPrintsAtLeastNodeEnvWithoutNode() {
 }
 
 function testNodeenvSegmentWorks() {
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(nodeenv)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(nodeenv)
     node() {
         echo "v1.2.3"
     }
diff --git a/test/segments/nvm.spec b/test/segments/nvm.spec
index 8f3b3c26..f4a4812a 100755
--- a/test/segments/nvm.spec
+++ b/test/segments/nvm.spec
@@ -32,14 +32,16 @@ function tearDown() {
 }
 
 function testNvmSegmentPrintsNothingIfNvmIsNotAvailable() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(nvm custom_world)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(nvm custom_world)
   local POWERLEVEL9K_CUSTOM_WORLD='echo world'
 
   assertEquals "%K{white} %F{black}world %k%F{white}%f " "$(build_left_prompt)"
 }
 
 function testNvmSegmentWorksWithoutHavingADefaultAlias() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(nvm)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(nvm)
 
   function nvm_version() {
     [[ ${1} == 'current' ]] && echo 'v4.6.0' || echo 'v1.4.0'
@@ -49,7 +51,8 @@ function testNvmSegmentWorksWithoutHavingADefaultAlias() {
 }
 
 function testNvmSegmentPrintsNothingWhenOnDefaultVersion() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(nvm custom_world)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(nvm custom_world)
   local POWERLEVEL9K_CUSTOM_WORLD='echo world'
 
   function nvm_version() {
diff --git a/test/segments/php_version.spec b/test/segments/php_version.spec
index ccf157c9..51fb398f 100755
--- a/test/segments/php_version.spec
+++ b/test/segments/php_version.spec
@@ -12,7 +12,8 @@ function setUp() {
 }
 
 function testPhpVersionSegmentPrintsNothingIfPhpIsNotAvailable() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(php_version custom_world)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(php_version custom_world)
   local POWERLEVEL9K_CUSTOM_WORLD='echo world'
   alias php="nophp"
 
@@ -22,7 +23,8 @@ function testPhpVersionSegmentPrintsNothingIfPhpIsNotAvailable() {
 }
 
 function testPhpVersionSegmentWorks() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(php_version)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(php_version)
   alias php="echo 'PHP 5.6.27 (cli) (built: Oct 23 2016 11:47:58)
 Copyright (c) 1997-2016 The PHP Group
 Zend Engine v2.6.0, Copyright (c) 1998-2016 Zend Technologies
diff --git a/test/segments/public_ip.spec b/test/segments/public_ip.spec
index a9c0a770..80dff215 100755
--- a/test/segments/public_ip.spec
+++ b/test/segments/public_ip.spec
@@ -36,7 +36,8 @@ function tearDown() {
 }
 
 function testPublicIpSegmentPrintsNothingByDefaultIfHostIsNotAvailable() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(public_ip custom_world)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(public_ip custom_world)
   local POWERLEVEL9K_PUBLIC_IP_HOST='http://unknown.xyz'
   local POWERLEVEL9K_CUSTOM_WORLD='echo world'
   # We need to overwrite dig, as this is a fallback method that
@@ -49,7 +50,8 @@ function testPublicIpSegmentPrintsNothingByDefaultIfHostIsNotAvailable() {
 }
 
 function testPublicIpSegmentPrintsNoticeIfNotConnected() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(public_ip)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(public_ip)
   local POWERLEVEL9K_PUBLIC_IP_HOST='http://unknown.xyz'
   local POWERLEVEL9K_PUBLIC_IP_NONE="disconnected"
   # We need to overwrite dig, as this is a fallback method that
@@ -62,7 +64,8 @@ function testPublicIpSegmentPrintsNoticeIfNotConnected() {
 }
 
 function testPublicIpSegmentWorksWithWget() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(public_ip)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(public_ip)
   alias dig='nodig'
   alias curl='nocurl'
   wget() {
@@ -77,7 +80,8 @@ function testPublicIpSegmentWorksWithWget() {
 }
 
 function testPublicIpSegmentUsesCurlAsFallbackMethodIfWgetIsNotAvailable() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(public_ip)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(public_ip)
   alias dig='nodig'
   alias wget='nowget'
   curl() {
@@ -92,7 +96,8 @@ function testPublicIpSegmentUsesCurlAsFallbackMethodIfWgetIsNotAvailable() {
 }
 
 function testPublicIpSegmentUsesDigAsFallbackMethodIfWgetAndCurlAreNotAvailable() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(public_ip)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(public_ip)
   alias curl='nocurl'
   alias wget='nowget'
   dig() {
@@ -107,7 +112,8 @@ function testPublicIpSegmentUsesDigAsFallbackMethodIfWgetAndCurlAreNotAvailable(
 }
 
 function testPublicIpSegmentCachesFile() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(public_ip)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(public_ip)
   dig() {
       echo "first"
   }
@@ -125,7 +131,8 @@ function testPublicIpSegmentCachesFile() {
 }
 
 function testPublicIpSegmentRefreshesCachesFileAfterTimeout() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(public_ip)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(public_ip)
   local POWERLEVEL9K_PUBLIC_IP_TIMEOUT=2
   dig() {
       echo "first"
@@ -145,7 +152,8 @@ function testPublicIpSegmentRefreshesCachesFileAfterTimeout() {
 }
 
 function testPublicIpSegmentRefreshesCachesFileIfEmpty() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(public_ip)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(public_ip)
   dig() {
       echo "first"
   }
@@ -166,7 +174,8 @@ function testPublicIpSegmentRefreshesCachesFileIfEmpty() {
 }
 
 function testPublicIpSegmentWhenGoingOnline() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(public_ip)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(public_ip)
   local POWERLEVEL9K_PUBLIC_IP_METHODS="dig"
   local POWERLEVEL9K_PUBLIC_IP_NONE="disconnected"
   alias dig="nodig"
diff --git a/test/segments/ram.spec b/test/segments/ram.spec
index 104b8c82..0deaacf9 100755
--- a/test/segments/ram.spec
+++ b/test/segments/ram.spec
@@ -28,7 +28,6 @@ function tearDown() {
 }
 
 function testRamSegmentWorksOnOsx() {
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(ram)
     local OS="OSX" # Fake OSX
     alias vm_stat="echo 'Mach Virtual Memory Statistics: (page size of 4096 bytes)
 Pages free:                              299687.
@@ -42,7 +41,6 @@ Pages inactive:                         1313411.
 }
 
 function testRamSegmentWorksOnBsd() {
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(ram)
     local OS="BSD" # Fake BSD
     mkdir -p var/run
     echo "avail memory 5678B 299687 4444G 299" > var/run/dmesg.boot
@@ -51,7 +49,6 @@ function testRamSegmentWorksOnBsd() {
 }
 
 function testRamSegmentWorksOnLinux() {
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(ram)
     local OS="Linux" # Fake Linux
     mkdir proc
     echo "MemAvailable: 299687" > proc/meminfo
diff --git a/test/segments/ssh.spec b/test/segments/ssh.spec
index 2ad4341e..a5360072 100755
--- a/test/segments/ssh.spec
+++ b/test/segments/ssh.spec
@@ -16,7 +16,8 @@ function mockRust() {
 }
 
 function testSshSegmentPrintsNothingIfNoSshConnection() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(ssh custom_world)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(ssh custom_world)
   local POWERLEVEL9K_CUSTOM_WORLD='echo "world"'
   local POWERLEVEL9K_SSH_ICON="ssh-icon"
   # Weak test: Emulate No SSH connection by unsetting
@@ -28,7 +29,8 @@ function testSshSegmentPrintsNothingIfNoSshConnection() {
 }
 
 function testSshSegmentWorksIfOnlySshClientIsSet() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(ssh)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(ssh)
   local POWERLEVEL9K_SSH_ICON="ssh-icon"
   # Weak test: Emulate No SSH connection by unsetting
   # $SSH_CLIENT and $SSH_TTY
@@ -41,7 +43,8 @@ function testSshSegmentWorksIfOnlySshClientIsSet() {
 }
 
 function testSshSegmentWorksIfOnlySshTtyIsSet() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(ssh)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(ssh)
   local POWERLEVEL9K_SSH_ICON="ssh-icon"
   # Weak test: Emulate No SSH connection by unsetting
   # $SSH_CLIENT and $SSH_TTY
@@ -54,7 +57,8 @@ function testSshSegmentWorksIfOnlySshTtyIsSet() {
 }
 
 function testSshSegmentWorksIfAllNecessaryVariablesAreSet() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(ssh)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(ssh)
   local POWERLEVEL9K_SSH_ICON="ssh-icon"
   # Weak test: Emulate No SSH connection by unsetting
   # $SSH_CLIENT and $SSH_TTY
diff --git a/test/segments/status.spec b/test/segments/status.spec
index 21bd65bb..d921111b 100755
--- a/test/segments/status.spec
+++ b/test/segments/status.spec
@@ -17,8 +17,9 @@ function setUp() {
 }
 
 function testStatusPrintsNothingIfReturnCodeIsZeroAndVerboseIsUnset() {
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(status custom_world)
     local POWERLEVEL9K_CUSTOM_WORLD='echo world'
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(status custom_world)
     local POWERLEVEL9K_STATUS_VERBOSE=false
     local POWERLEVEL9K_STATUS_SHOW_PIPESTATUS=false
 
@@ -26,56 +27,63 @@ function testStatusPrintsNothingIfReturnCodeIsZeroAndVerboseIsUnset() {
 }
 
 function testStatusWorksAsExpectedIfReturnCodeIsZeroAndVerboseIsSet() {
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(status)
     local POWERLEVEL9K_STATUS_VERBOSE=true
     local POWERLEVEL9K_STATUS_SHOW_PIPESTATUS=false
     local POWERLEVEL9K_STATUS_HIDE_SIGNAME=true
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(status)
 
     assertEquals "%K{black} %F{green%}✔%f %k%F{black}%f " "$(build_left_prompt)"
 }
 
 function testStatusInGeneralErrorCase() {
-    local RETVAL=1
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(status)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(status)
     local POWERLEVEL9K_STATUS_VERBOSE=true
     local POWERLEVEL9K_STATUS_SHOW_PIPESTATUS=false
+    local RETVAL=1
 
     assertEquals "%K{red} %F{yellow1%}↵ %f%F{yellow1}1 %k%F{red}%f " "$(build_left_prompt)"
 }
 
 function testPipestatusInErrorCase() {
-    local -a RETVALS
-    RETVALS=(0 0 1 0)
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(status)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(status)
     local POWERLEVEL9K_STATUS_VERBOSE=true
     local POWERLEVEL9K_STATUS_SHOW_PIPESTATUS=true
+    local -a RETVALS
+    RETVALS=(0 0 1 0)
 
     assertEquals "%K{red} %F{yellow1%}↵ %f%F{yellow1}0|0|1|0 %k%F{red}%f " "$(build_left_prompt)"
 }
 
 function testStatusCrossWinsOverVerbose() {
-    local RETVAL=1
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(status)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(status)
     local POWERLEVEL9K_STATUS_SHOW_PIPESTATUS=false
     local POWERLEVEL9K_STATUS_VERBOSE=true
     local POWERLEVEL9K_STATUS_CROSS=true
+    local RETVAL=1
 
     assertEquals "%K{black} %F{red%}✘%f %k%F{black}%f " "$(build_left_prompt)"
 }
 
 function testStatusShowsSignalNameInErrorCase() {
-    local RETVAL=132
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(status)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(status)
     local POWERLEVEL9K_STATUS_SHOW_PIPESTATUS=false
     local POWERLEVEL9K_STATUS_VERBOSE=true
     local POWERLEVEL9K_STATUS_HIDE_SIGNAME=false
+    local RETVAL=132
 
     assertEquals "%K{red} %F{yellow1%}↵ %f%F{yellow1}SIGILL(4) %k%F{red}%f " "$(build_left_prompt)"
 }
 
 function testStatusSegmentIntegrated() {
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(status)
-    local POWERLEVEL9K_RIGHT_PROMPT_ELEMENTS=()
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(status)
+    local -a POWERLEVEL9K_RIGHT_PROMPT_ELEMENTS
+    POWERLEVEL9K_RIGHT_PROMPT_ELEMENTS=()
 
     false; powerlevel9k_prepare_prompts
 
diff --git a/test/segments/swap.spec b/test/segments/swap.spec
index 52719395..58f35c0a 100755
--- a/test/segments/swap.spec
+++ b/test/segments/swap.spec
@@ -28,7 +28,8 @@ function tearDown() {
 }
 
 function testSwapSegmentWorksOnOsx() {
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(swap)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(swap)
     local OS="OSX" # Fake OSX
     sysctl() {
         echo "vm.swapusage: total = 3072,00M  used = 1620,50M  free = 1451,50M  (encrypted)"
@@ -40,7 +41,8 @@ function testSwapSegmentWorksOnOsx() {
 }
 
 function testSwapSegmentWorksOnLinux() {
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(swap)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(swap)
     local OS="Linux" # Fake Linux
     mkdir proc
     echo "SwapTotal: 1000000" > proc/meminfo
diff --git a/test/segments/swift_version.spec b/test/segments/swift_version.spec
index e58cc817..5634de11 100755
--- a/test/segments/swift_version.spec
+++ b/test/segments/swift_version.spec
@@ -28,7 +28,8 @@ function tearDown() {
 }
 
 function testSwiftSegmentPrintsNothingIfSwiftIsNotAvailable() {
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(swift_version custom_world)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(swift_version custom_world)
     local POWERLEVEL9K_CUSTOM_WORLD='echo world'
     alias swift="noswift"
 
@@ -39,7 +40,8 @@ function testSwiftSegmentPrintsNothingIfSwiftIsNotAvailable() {
 }
 
 function testSwiftSegmentWorks() {
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(swift_version)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(swift_version)
     function swift() {
         echo "Apple Swift version 3.0.1 (swiftlang-800.0.58.6 clang-800.0.42.1)\nTarget: x86_64-apple-macosx10.9"
     }
diff --git a/test/segments/symfony_version.spec b/test/segments/symfony_version.spec
index ba0bf96a..65d193b0 100755
--- a/test/segments/symfony_version.spec
+++ b/test/segments/symfony_version.spec
@@ -28,7 +28,8 @@ function tearDown() {
 }
 
 function testSymfonyVersionSegmentPrintsNothingIfPhpIsNotAvailable() {
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(symfony2_version custom_world)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(symfony2_version custom_world)
     local POWERLEVEL9K_CUSTOM_WORLD='echo world'
     alias php="nophp"
 
@@ -38,7 +39,8 @@ function testSymfonyVersionSegmentPrintsNothingIfPhpIsNotAvailable() {
 }
 
 function testSymfonyVersionSegmentPrintsNothingIfSymfonyIsNotAvailable() {
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(symfony2_version custom_world)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(symfony2_version custom_world)
     # "Symfony" is not a command, but rather a framework.
     # To sucessfully execute this test, we just need to
     # navigate into a folder that does not contain symfony.
@@ -48,7 +50,8 @@ function testSymfonyVersionSegmentPrintsNothingIfSymfonyIsNotAvailable() {
 }
 
 function testSymfonyVersionPrintsNothingIfPhpThrowsAnError() {
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(symfony2_version custom_world)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(symfony2_version custom_world)
     local POWERLEVEL9K_CUSTOM_WORLD='echo world'
     mkdir app
     touch app/AppKernel.php
@@ -65,7 +68,8 @@ function testSymfonyVersionPrintsNothingIfPhpThrowsAnError() {
 
 function testSymfonyVersionSegmentWorks() {
     startSkipping # Skip test
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(symfony2_version)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(symfony2_version)
     mkdir app
     touch app/AppKernel.php
 
@@ -80,7 +84,8 @@ function testSymfonyVersionSegmentWorks() {
 
 function testSymfonyVersionSegmentWorksInNestedFolder() {
     startSkipping # Skip test
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(symfony2_version)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(symfony2_version)
     mkdir app
     touch app/AppKernel.php
 
diff --git a/test/segments/todo.spec b/test/segments/todo.spec
index 0d2d8203..1dae9a68 100755
--- a/test/segments/todo.spec
+++ b/test/segments/todo.spec
@@ -33,7 +33,8 @@ function tearDown() {
 }
 
 function testTodoSegmentPrintsNothingIfTodoShIsNotInstalled() {
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(todo custom_world)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(todo custom_world)
     local POWERLEVEL9K_CUSTOM_WORLD='echo world'
 
     assertEquals "%K{white} %F{black}world %k%F{white}%f " "$(build_left_prompt)"
@@ -41,7 +42,8 @@ function testTodoSegmentPrintsNothingIfTodoShIsNotInstalled() {
 
 function testTodoSegmentWorksAsExpected() {
     # TODO: Skript in den PATH legen!
-    local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(todo)
+    local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+    POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(todo)
     echo '#!/bin/sh' > ${FOLDER}/bin/todo.sh
     echo 'echo "TODO: 34 of 100 tasks shown";' >> ${FOLDER}/bin/todo.sh
     chmod +x ${FOLDER}/bin/todo.sh
diff --git a/test/segments/vcs-git.spec b/test/segments/vcs-git.spec
index 9429589d..3ae4077e 100755
--- a/test/segments/vcs-git.spec
+++ b/test/segments/vcs-git.spec
@@ -70,7 +70,8 @@ function tearDown() {
 }
 
 function testColorOverridingForCleanStateWorks() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
   local POWERLEVEL9K_VCS_CLEAN_FOREGROUND='cyan'
   local POWERLEVEL9K_VCS_CLEAN_BACKGROUND='white'
 
@@ -78,7 +79,8 @@ function testColorOverridingForCleanStateWorks() {
 }
 
 function testColorOverridingForModifiedStateWorks() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
   local POWERLEVEL9K_VCS_MODIFIED_FOREGROUND='red'
   local POWERLEVEL9K_VCS_MODIFIED_BACKGROUND='yellow'
 
@@ -91,7 +93,8 @@ function testColorOverridingForModifiedStateWorks() {
 }
 
 function testColorOverridingForUntrackedStateWorks() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
   local POWERLEVEL9K_VCS_UNTRACKED_FOREGROUND='cyan'
   local POWERLEVEL9K_VCS_UNTRACKED_BACKGROUND='yellow'
 
@@ -108,7 +111,8 @@ function testGitIconWorks() {
 }
 
 function testGitlabIconWorks() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
   local POWERLEVEL9K_VCS_GIT_GITLAB_ICON='GL-Icon'
 
   # Add a GitLab project as remote origin. This is
@@ -119,7 +123,8 @@ function testGitlabIconWorks() {
 }
 
 function testBitbucketIconWorks() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
   local POWERLEVEL9K_VCS_GIT_BITBUCKET_ICON='BB-Icon'
 
   # Add a BitBucket project as remote origin. This is
@@ -130,7 +135,8 @@ function testBitbucketIconWorks() {
 }
 
 function testGitHubIconWorks() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
   local POWERLEVEL9K_VCS_GIT_GITHUB_ICON='GH-Icon'
 
   # Add a GitHub project as remote origin. This is
@@ -141,7 +147,8 @@ function testGitHubIconWorks() {
 }
 
 function testUntrackedFilesIconWorks() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
   local POWERLEVEL9K_VCS_UNTRACKED_ICON='?'
 
   # Create untracked file
@@ -151,7 +158,8 @@ function testUntrackedFilesIconWorks() {
 }
 
 function testStagedFilesIconWorks() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
   local POWERLEVEL9K_VCS_STAGED_ICON='+'
 
   # Create staged file
@@ -165,7 +173,8 @@ function testStagedFilesIconWorks() {
 }
 
 function testUnstagedFilesIconWorks() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
   local POWERLEVEL9K_VCS_UNSTAGED_ICON='M'
 
   # Create unstaged (modified, but not added to index) file
@@ -178,7 +187,8 @@ function testUnstagedFilesIconWorks() {
 }
 
 function testStashIconWorks() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
   local POWERLEVEL9K_VCS_STASH_ICON='S'
 
   # Create modified file
@@ -192,7 +202,8 @@ function testStashIconWorks() {
 }
 
 function testTagIconWorks() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
   local POWERLEVEL9K_VCS_TAG_ICON='T'
 
   touch "file.txt"
@@ -204,7 +215,8 @@ function testTagIconWorks() {
 }
 
 function testTagIconInDetachedHeadState() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
   local POWERLEVEL9K_VCS_TAG_ICON='T'
 
   touch "file.txt"
@@ -221,7 +233,8 @@ function testTagIconInDetachedHeadState() {
 }
 
 function testActionHintWorks() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
 
   touch "i-am-modified.txt"
   git add i-am-modified.txt
@@ -240,7 +253,8 @@ function testActionHintWorks() {
 }
 
 function testIncomingHintWorks() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
   local POWERLEVEL9K_VCS_INCOMING_CHANGES_ICON='I'
 
   touch "i-am-modified.txt"
@@ -258,7 +272,8 @@ function testIncomingHintWorks() {
 }
 
 function testOutgoingHintWorks() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
   local POWERLEVEL9K_VCS_OUTGOING_CHANGES_ICON='o'
 
   touch "i-am-modified.txt"
@@ -276,7 +291,8 @@ function testOutgoingHintWorks() {
 }
 
 function testShorteningCommitHashWorks() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
   local POWERLEVEL9K_SHOW_CHANGESET=true
   local POWERLEVEL9K_CHANGESET_HASH_LENGTH='4'
 
@@ -292,7 +308,8 @@ function testShorteningCommitHashWorks() {
 }
 
 function testShorteningCommitHashIsNotShownIfShowChangesetIsFalse() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
   local POWERLEVEL9K_SHOW_CHANGESET=false
   local POWERLEVEL9K_CHANGESET_HASH_LENGTH='4'
 
diff --git a/test/segments/vcs-hg.spec b/test/segments/vcs-hg.spec
index 6d8c6428..91d25ae6 100755
--- a/test/segments/vcs-hg.spec
+++ b/test/segments/vcs-hg.spec
@@ -34,7 +34,8 @@ function tearDown() {
 }
 
 function testColorOverridingForCleanStateWorks() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
   local POWERLEVEL9K_VCS_CLEAN_FOREGROUND='cyan'
   local POWERLEVEL9K_VCS_CLEAN_BACKGROUND='white'
 
@@ -42,7 +43,8 @@ function testColorOverridingForCleanStateWorks() {
 }
 
 function testColorOverridingForModifiedStateWorks() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
   local POWERLEVEL9K_VCS_MODIFIED_FOREGROUND='red'
   local POWERLEVEL9K_VCS_MODIFIED_BACKGROUND='yellow'
 
@@ -60,7 +62,8 @@ function testColorOverridingForModifiedStateWorks() {
 # This may be improved in future versions, to be a bit more consistent with
 # the git part.
 function testAddedFilesIconWorks() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
   touch "myfile.txt"
   hg add myfile.txt
 
@@ -70,7 +73,8 @@ function testAddedFilesIconWorks() {
 # We don't support tagging in mercurial right now..
 function testTagIconWorks() {
   startSkipping # Skip test
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
   local POWERLEVEL9K_VCS_TAG_ICON='T'
 
   touch "file.txt"
@@ -83,7 +87,8 @@ function testTagIconWorks() {
 
 function testTagIconInDetachedHeadState() {
   startSkipping # Skip test
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
   local POWERLEVEL9K_VCS_TAG_ICON='T'
 
   touch "file.txt"
@@ -100,7 +105,8 @@ function testTagIconInDetachedHeadState() {
 }
 
 function testActionHintWorks() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
   touch "i-am-modified.txt"
   hg add i-am-modified.txt
   hg commit -m "Add File" &>/dev/null
@@ -119,7 +125,8 @@ function testActionHintWorks() {
 }
 
 function testShorteningCommitHashWorks() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
   local POWERLEVEL9K_SHOW_CHANGESET=true
   local POWERLEVEL9K_CHANGESET_HASH_LENGTH='4'
 
@@ -136,7 +143,8 @@ function testShorteningCommitHashWorks() {
 }
 
 function testShorteningCommitHashIsNotShownIfShowChangesetIsFalse() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
   local POWERLEVEL9K_SHOW_CHANGESET=false
   local POWERLEVEL9K_CHANGESET_HASH_LENGTH='4'
 
@@ -152,14 +160,16 @@ function testShorteningCommitHashIsNotShownIfShowChangesetIsFalse() {
 }
 
 function testMercurialIconWorks() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
   local POWERLEVEL9K_VCS_HG_ICON='HG-Icon'
 
   assertEquals "%K{green} %F{black%}HG-Icon %f%F{black} default %k%F{green}%f " "$(build_left_prompt)"
 }
 
 function testBookmarkIconWorks() {
-  local POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
+  local -a POWERLEVEL9K_LEFT_PROMPT_ELEMENTS
+  POWERLEVEL9K_LEFT_PROMPT_ELEMENTS=(vcs)
   local POWERLEVEL9K_VCS_BOOKMARK_ICON='B'
   hg bookmark "initial"