diff --git a/org.eclipse.jdt.core.tests.compiler/src/org/eclipse/jdt/core/tests/compiler/regression/InstanceofPrimaryPatternTest.java b/org.eclipse.jdt.core.tests.compiler/src/org/eclipse/jdt/core/tests/compiler/regression/InstanceofPrimaryPatternTest.java
index 0cc98c3f720..f41995cc9b7 100644
--- a/org.eclipse.jdt.core.tests.compiler/src/org/eclipse/jdt/core/tests/compiler/regression/InstanceofPrimaryPatternTest.java
+++ b/org.eclipse.jdt.core.tests.compiler/src/org/eclipse/jdt/core/tests/compiler/regression/InstanceofPrimaryPatternTest.java
@@ -92,6 +92,24 @@ public void test001() {
 			options);
 	}
 	public void test002() {
+		String expectedDiagnostics = this.complianceLevel < ClassFileConstants.JDK20 ?
+				"----------\n" +
+				"1. ERROR in X.java (at line 3)\n" +
+				"	if (obj instanceof (String s)) {\n" +
+				"	                   ^\n" +
+				"Syntax error on token \"(\", delete this token\n" +
+				"----------\n" +
+				"2. ERROR in X.java (at line 3)\n" +
+				"	if (obj instanceof (String s)) {\n" +
+				"	                             ^\n" +
+				"Syntax error on token \")\", delete this token\n" +
+				"----------\n" :
+							"----------\n" +
+							"1. ERROR in X.java (at line 3)\n" +
+							"	if (obj instanceof (String s)) {\n" +
+							"	        ^^^^^^^^^^\n" +
+							"Syntax error on token \"instanceof\", ReferenceType expected after this token\n" +
+							"----------\n";
 		runNegativeTest(
 			new String[] {
 				"X.java",
@@ -106,19 +124,49 @@ public void test002() {
 				"	}\n" +
 				"}\n",
 			},
-			"----------\n" +
-			"1. ERROR in X.java (at line 3)\n" +
-			"	if (obj instanceof (String s)) {\n" +
-			"	                   ^\n" +
-			"Syntax error on token \"(\", delete this token\n" +
-			"----------\n" +
-			"2. ERROR in X.java (at line 3)\n" +
-			"	if (obj instanceof (String s)) {\n" +
-			"	                             ^\n" +
-			"Syntax error on token \")\", delete this token\n" +
-			"----------\n");
+			expectedDiagnostics);
 	}
 	public void test003() {
+
+		String expectedDiagnostics = this.complianceLevel < ClassFileConstants.JDK20 ?
+				"----------\n" +
+				"1. ERROR in X.java (at line 3)\n" +
+				"	if (obj instanceof ((String s))) {\n" +
+				"	        ^^^^^^^^^^\n" +
+				"Syntax error, insert \"Type\" to complete InstanceofClassic\n" +
+				"----------\n" +
+				"2. ERROR in X.java (at line 3)\n" +
+				"	if (obj instanceof ((String s))) {\n" +
+				"	        ^^^^^^^^^^\n" +
+				"Syntax error, insert \") Statement\" to complete BlockStatements\n" +
+				"----------\n" +
+				"3. ERROR in X.java (at line 3)\n" +
+				"	if (obj instanceof ((String s))) {\n" +
+				"	                     ^^^^^^\n" +
+				"Syntax error on token \"String\", ( expected after this token\n" +
+				"----------\n" +
+				"4. ERROR in X.java (at line 3)\n" +
+				"	if (obj instanceof ((String s))) {\n" +
+				"	                               ^\n" +
+				"Syntax error, insert \"AssignmentOperator Expression\" to complete Assignment\n" +
+				"----------\n" +
+				"5. ERROR in X.java (at line 3)\n" +
+				"	if (obj instanceof ((String s))) {\n" +
+				"	                               ^\n" +
+				"Syntax error, insert \";\" to complete Statement\n" +
+				"----------\n" :
+									"----------\n" +
+									"1. ERROR in X.java (at line 3)\n" +
+									"	if (obj instanceof ((String s))) {\n" +
+									"	                   ^\n" +
+									"Syntax error on token \"(\", invalid ReferenceType\n" +
+									"----------\n" +
+									"2. ERROR in X.java (at line 3)\n" +
+									"	if (obj instanceof ((String s))) {\n" +
+									"	                               ^\n" +
+									"Syntax error on token \")\", delete this token\n" +
+									"----------\n";
+
 		runNegativeTest(
 			new String[] {
 				"X.java",
@@ -133,32 +181,7 @@ public void test003() {
 				"	}\n" +
 				"}\n",
 			},
-			"----------\n" +
-			"1. ERROR in X.java (at line 3)\n" +
-			"	if (obj instanceof ((String s))) {\n" +
-			"	        ^^^^^^^^^^\n" +
-			"Syntax error, insert \"Type\" to complete InstanceofClassic\n" +
-			"----------\n" +
-			"2. ERROR in X.java (at line 3)\n" +
-			"	if (obj instanceof ((String s))) {\n" +
-			"	        ^^^^^^^^^^\n" +
-			"Syntax error, insert \") Statement\" to complete BlockStatements\n" +
-			"----------\n" +
-			"3. ERROR in X.java (at line 3)\n" +
-			"	if (obj instanceof ((String s))) {\n" +
-			"	                     ^^^^^^\n" +
-			"Syntax error on token \"String\", ( expected after this token\n" +
-			"----------\n" +
-			"4. ERROR in X.java (at line 3)\n" +
-			"	if (obj instanceof ((String s))) {\n" +
-			"	                               ^\n" +
-			"Syntax error, insert \"AssignmentOperator Expression\" to complete Assignment\n" +
-			"----------\n" +
-			"5. ERROR in X.java (at line 3)\n" +
-			"	if (obj instanceof ((String s))) {\n" +
-			"	                               ^\n" +
-			"Syntax error, insert \";\" to complete Statement\n" +
-			"----------\n");
+			expectedDiagnostics);
 	}
 	public void test007() {
 		runNegativeTest(