diff --git a/vars/pipelineStashFilesAfterBuild.groovy b/vars/pipelineStashFilesAfterBuild.groovy
index 0e3ad303b..edcd54d9d 100644
--- a/vars/pipelineStashFilesAfterBuild.groovy
+++ b/vars/pipelineStashFilesAfterBuild.groovy
@@ -48,14 +48,14 @@ void call(Map parameters = [:]) {
 
         utils.stashWithMessage(
             'classFiles',
-            '[${STEP_NAME}] Failed to stash class files.',
+            "[${STEP_NAME}] Failed to stash class files.",
             config.stashIncludes.classFiles,
             config.stashExcludes.classFiles
         )
 
         utils.stashWithMessage(
             'sonar',
-            '[${STEP_NAME}] Failed to stash sonar files.',
+            "[${STEP_NAME}] Failed to stash sonar files.",
             config.stashIncludes.sonar,
             config.stashExcludes.sonar
         )
diff --git a/vars/pipelineStashFilesBeforeBuild.groovy b/vars/pipelineStashFilesBeforeBuild.groovy
index 161c3f892..dd90ba498 100644
--- a/vars/pipelineStashFilesBeforeBuild.groovy
+++ b/vars/pipelineStashFilesBeforeBuild.groovy
@@ -48,7 +48,7 @@ void call(Map parameters = [:]) {
         //store deployment descriptor files depending on technology, e.g. *.mtaext.yml
         utils.stashWithMessage(
             'deployDescriptor',
-            '[${STEP_NAME}] no deployment descriptor files provided: ',
+            "[${STEP_NAME}] no deployment descriptor files provided: ",
             config.stashIncludes.deployDescriptor,
             config.stashExcludes.deployDescriptor
         )
@@ -58,34 +58,34 @@ void call(Map parameters = [:]) {
         sh "chmod -R u+w gitmetadata"
         utils.stashWithMessage(
             'git',
-            '[${STEP_NAME}] no git repo files detected: ',
+            "[${STEP_NAME}] no git repo files detected: ",
             config.stashIncludes.git,
             config.stashExcludes.git
         )
         //store nsp & retire exclusion file for future use
         utils.stashWithMessage(
             'opensourceConfiguration',
-            '[${STEP_NAME}] no opensourceConfiguration files provided: ',
+            "[${STEP_NAME}] no opensourceConfiguration files provided: ",
             config.stashIncludes.get('opensourceConfiguration'),
             config.stashExcludes.get('opensourceConfiguration')
         )
         //store pipeline configuration including additional groovy test scripts for future use
         utils.stashWithMessage(
             'pipelineConfigAndTests',
-            '[${STEP_NAME}] no pipeline configuration and test files found: ',
+            "[${STEP_NAME}] no pipeline configuration and test files found: ",
             config.stashIncludes.pipelineConfigAndTests,
             config.stashExcludes.pipelineConfigAndTests
         )
         utils.stashWithMessage(
             'securityDescriptor',
-            '[${STEP_NAME}] no security descriptor found: ',
+            "[${STEP_NAME}] no security descriptor found: ",
             config.stashIncludes.securityDescriptor,
             config.stashExcludes.securityDescriptor
         )
         //store files required for tests, e.g. Gauge, SUT, ...
         utils.stashWithMessage(
             'tests',
-            '[${STEP_NAME}] no files for tests provided: ',
+            "[${STEP_NAME}] no files for tests provided: ",
             config.stashIncludes.tests,
             config.stashExcludes.tests
         )