diff --git a/pester.sh b/pester.sh
index 032958d2cf..2cce72081f 100755
--- a/pester.sh
+++ b/pester.sh
@@ -1,3 +1,10 @@
-./bin/powershell -c "Invoke-Pester test/powershell/$1 -OutputFile pester-tests.xml -OutputFormat NUnitXml"
+#!/usr/bin/env bash
+
+./bin/powershell -c "Invoke-Pester test/powershell/$1 -OutputFile pester-tests.xml -OutputFormat NUnitXml -EnableExit"
+failed_tests=$?
+
 # XML files are not executable
 chmod -x pester-tests.xml
+
+# Exit with failure if number of failed tests exceeds threshold
+[ ! $failed_tests -gt 14 ]