diff --git a/test/tests/testunity.c b/test/tests/testunity.c
index eb6601a..f1316b9 100644
--- a/test/tests/testunity.c
+++ b/test/tests/testunity.c
@@ -1390,6 +1390,13 @@ void testNotEqualString_ExpectedStringIsNull(void)
     VERIFY_FAILS_END
 }
 
+void testNotEqualStringLen_ExpectedStringIsNull(void)
+{
+    EXPECT_ABORT_BEGIN
+    TEST_ASSERT_EQUAL_STRING_LEN(NULL, "bar", 1);
+    VERIFY_FAILS_END
+}
+
 void testNotEqualString_ActualStringIsNull(void)
 {
     EXPECT_ABORT_BEGIN
@@ -1397,6 +1404,13 @@ void testNotEqualString_ActualStringIsNull(void)
     VERIFY_FAILS_END
 }
 
+void testNotEqualStringLen_ActualStringIsNull(void)
+{
+    EXPECT_ABORT_BEGIN
+    TEST_ASSERT_EQUAL_STRING_LEN("foo", NULL, 1);
+    VERIFY_FAILS_END
+}
+
 void testEqualStringArrays(void)
 {
     const char *testStrings[] = { "foo", "boo", "woo", "moo" };