diff --git a/appveyor.yml b/appveyor.yml
index d20b8a04c4..0bdf352f9d 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -20,7 +20,7 @@ build_script:
 test_script:
   - ps: |
       $testResultsFile = ".\TestsResults.xml"
-      .\bin\powershell.exe -c "Invoke-Pester test/powershell -OutputFormat NUnitXml -OutputFile $testResultsFile"
+      .\bin\powershell.exe --noprofile -c "Invoke-Pester test/powershell -OutputFormat NUnitXml -OutputFile $testResultsFile"
       (New-Object 'System.Net.WebClient').UploadFile("https://ci.appveyor.com/api/testresults/nunit/$($env:APPVEYOR_JOB_ID)", (Resolve-Path $testResultsFile))
 
 
diff --git a/pester.sh b/pester.sh
index 2cce72081f..25073a1108 100755
--- a/pester.sh
+++ b/pester.sh
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-./bin/powershell -c "Invoke-Pester test/powershell/$1 -OutputFile pester-tests.xml -OutputFormat NUnitXml -EnableExit"
+./bin/powershell --noprofile -c "Invoke-Pester test/powershell/$1 -OutputFile pester-tests.xml -OutputFormat NUnitXml -EnableExit"
 failed_tests=$?
 
 # XML files are not executable