diff --git a/CHANGELOG.md b/CHANGELOG.md
index e691808..3915300 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,13 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [unreleased]
 
+## [3.3.1]
+
+### Fixed
+
+- bug #19 (FAILCHECK mode does not work)
+- references in change log
+
 ## [3.3.0]
 
 ### Fixed
@@ -228,7 +235,9 @@ aligned with SDaaS [2.1.0]
 First release, aligned with SDaaS [2.0.3] (Talete)
 
 
-[Unreleased]:  https://github.com/linkeddatacenter/sdaas-ce/compare/3.2.2...HEAD
+[Unreleased]:  https://github.com/linkeddatacenter/sdaas-ce/compare/3.3.1...HEAD
+[3.3.1]:  https://github.com/linkeddatacenter/sdaas-ce/compare/3.3.1...3.3.0
+[3.3.0]:  https://github.com/linkeddatacenter/sdaas-ce/compare/3.3.0...3.2.2
 [3.2.2]:  https://github.com/linkeddatacenter/sdaas-ce/compare/3.2.2...3.1.1
 [3.2.1]:  https://github.com/linkeddatacenter/sdaas-ce/compare/3.2.1...3.1.0
 [3.2.0]:  https://github.com/linkeddatacenter/sdaas-ce/compare/3.2.0...3.1.0
diff --git a/scripts/testing.include b/scripts/testing.include
index 720b0ee..2c5c1b7 100644
--- a/scripts/testing.include
+++ b/scripts/testing.include
@@ -23,7 +23,7 @@ function SD_DATA_TEST {
 	        	if [ "$failMode" = "FASTFAIL" ]; then
 	        		SD_FATAL_ERROR "test FASTFAIL"
 	        	else
-	        		failedTests=$((failedTests++))
+	        		((failedTests++))
 	        	fi
 	        	;;
 	    esac
@@ -38,13 +38,13 @@ function SD_DATA_TEST {
         	if [ "$failMode" = "FASTFAIL" ]; then
         		SD_FATAL_ERROR "test FASTFAIL"
         	else
-        		failedTests=$((failedTests++))
+        		((failedTests++))
         	fi
 	    fi
 	done
 	
-	if [ "$failMode" = "FAILCHECK " ] && [ $failedTests -gt 0 ] ; then
-		SD_FATAL_ERROR "abort on$failedTests test failed."
+	if [ "$failMode" = "FAILCHECK " -a $failedTests -gt 0 ] ; then
+		SD_FATAL_ERROR "abort on $failedTests test failed."
 	fi
 }