diff --git a/com.reprezen.swagedit.tests/src/com/reprezen/swagedit/tests/ValidationMessageTest.xtend b/com.reprezen.swagedit.tests/src/com/reprezen/swagedit/tests/ValidationMessageTest.xtend
index 9bb07fa4..a45fabe7 100644
--- a/com.reprezen.swagedit.tests/src/com/reprezen/swagedit/tests/ValidationMessageTest.xtend
+++ b/com.reprezen.swagedit.tests/src/com/reprezen/swagedit/tests/ValidationMessageTest.xtend
@@ -22,7 +22,7 @@ class ValidationMessageTest {
 	
 	@Test
 	def testMessage_additionalItems_notAllowed() {
-		var expected = "instance type (integer) does not match any allowed primitive type (allowed: [\"array\"])"
+		var expected = 'instance type (integer) does not match any allowed primitive type (allowed: ["array"])'
 		// parameters should contain an array of object
 		val content = '''
 		swagger: '2.0'
@@ -43,7 +43,7 @@ class ValidationMessageTest {
 
 	@Test
 	def testMessage_typeNoMatch() {
-		var expected = "instance type (integer) does not match any allowed primitive type (allowed: [\"object\"])"
+		var expected = 'instance type (integer) does not match any allowed primitive type (allowed: ["object"])'
 		// responses should contain an object
 		val content = '''
 		swagger: '2.0'
@@ -61,7 +61,7 @@ class ValidationMessageTest {
 
 	@Test
 	def	testMessage_notInEnum() {
-		val expected = "instance value (\"foo\") not found in enum (possible values: [\"http\",\"https\",\"ws\",\"wss\"])"
+		val expected = 'instance value ("foo") not found in enum (possible values: ["http","https","ws","wss"])'
 		val content = '''
 		swagger: '2.0'
 		info:
@@ -83,7 +83,7 @@ class ValidationMessageTest {
 
 	@Test
 	def testMessage_oneOf_fail() {
-		val expected = "instance failed to match exactly one schema (matched 0 out of 2)"		
+		val expected = 'instance failed to match exactly one schema (matched 0 out of 2)'		
 		val content = '''
 		swagger: '2.0'
 		info:
@@ -102,7 +102,7 @@ class ValidationMessageTest {
 
 	@Test
 	def testMessage_additionalProperties_notAllowed() {
-		val expected = "object instance has properties which are not allowed by the schema: [\"description\"]"
+		val expected = 'object instance has properties which are not allowed by the schema: ["description"]'
 		// description should be 2 spaces forward		
 		val content = '''
 		swagger: '2.0'