report null-issue in super call exactly once,
solution is a bit clumsy because we were affected by two OTRE bugs (solution should work on OTRE 2.0.0)
diff --git a/contrib/org.eclipse.objectteams.jdt.nullity.tests/src/org/eclipse/objectteams/jdt/nullity/tests/NullAnnotationTest.java b/contrib/org.eclipse.objectteams.jdt.nullity.tests/src/org/eclipse/objectteams/jdt/nullity/tests/NullAnnotationTest.java
index 1776caa..6cb4e22 100644
--- a/contrib/org.eclipse.objectteams.jdt.nullity.tests/src/org/eclipse/objectteams/jdt/nullity/tests/NullAnnotationTest.java
+++ b/contrib/org.eclipse.objectteams.jdt.nullity.tests/src/org/eclipse/objectteams/jdt/nullity/tests/NullAnnotationTest.java
@@ -54,7 +54,7 @@
 // Static initializer to specify tests subset using TESTS_* static variables
 // All specified tests which do not belong to the class are skipped...
 static {
-//		TESTS_NAMES = new String[] { "test_nonnull_return_004" };
+//		TESTS_NAMES = new String[] { "test_parameter_specification_inheritance_011" };
 //		TESTS_NUMBERS = new int[] { 561 };
 //		TESTS_RANGE = new int[] { 1, 2049 };
 }
@@ -698,6 +698,43 @@
 		customOptions,
 		"");
 }
+// class default is nonnull, method and its super both use the default, super-call passes null
+public void test_parameter_specification_inheritance_011() {
+	Map customOptions = getCompilerOptions();
+	customOptions.put(CompilerOptions.OPTION_ReportNullReference, CompilerOptions.ERROR);
+	customOptions.put(NullCompilerOptions.OPTION_ReportNullContractInsufficientInfo, CompilerOptions.ERROR);
+	runNegativeTestWithLibs(
+		new String[] {
+	"p1/X.java",
+			"package p1;\n" +
+			"import org.eclipse.jdt.annotation.*;\n" +
+			"@NonNullByDefault\n" +
+			"public class X {\n" +
+			"    protected String getString(String s) {\n" +
+			"        if (Character.isLowerCase(s.charAt(0)))\n" +
+			"	        return getString(s);\n" +
+			"	     return s;\n" +
+			"    }\n" +
+			"}\n",
+	"p1/Y.java",
+			"package p1;\n" +
+			"import org.eclipse.jdt.annotation.*;\n" +
+			"@NonNullByDefault\n" +
+			"public class Y extends X {\n" +
+			"    @Override\n" +
+			"    protected String getString(String s) {\n" +
+			"	     return super.getString(null);\n" +
+			"    }\n" +
+			"}\n",
+		},
+		customOptions,
+		"----------\n" + 
+		"1. ERROR in p1\\Y.java (at line 7)\n" + 
+		"	return super.getString(null);\n" + 
+		"	                       ^^^^\n" + 
+		"Type mismatch: required \'@NonNull String\' but the provided value is null\n" + 
+		"----------\n");
+}
 
 // a nullable return value is dereferenced without a check
 public void test_nullable_return_001() {