diff --git a/include/kunit/test.h b/include/kunit/test.h
index 87ea90576b50749ddac8d7d17e6a2848b6bbad9e..a20bff149bdf3488d11cac1c3dea7111460c05ba 100644
--- a/include/kunit/test.h
+++ b/include/kunit/test.h
@@ -683,8 +683,9 @@ do {									       \
 		.right_text = #right,					       \
 	};								       \
 									       \
-	if (likely(memcmp(__left, __right, __size) op 0))		       \
-		break;							       \
+	if (likely(__left && __right))					       \
+		if (likely(memcmp(__left, __right, __size) op 0))	       \
+			break;						       \
 									       \
 	_KUNIT_FAILED(test,						       \
 		      assert_type,					       \
diff --git a/lib/kunit/assert.c b/lib/kunit/assert.c
index f5b50babe38d46586bd9057c4386c8f02ec0bb23..05a09652f5a105f401874366ce74476eebc0e0e0 100644
--- a/lib/kunit/assert.c
+++ b/lib/kunit/assert.c
@@ -241,24 +241,34 @@ void kunit_mem_assert_format(const struct kunit_assert *assert,
 	mem_assert = container_of(assert, struct kunit_mem_assert,
 				  assert);
 
-	string_stream_add(stream,
-			  KUNIT_SUBTEST_INDENT "Expected %s %s %s, but\n",
-			  mem_assert->text->left_text,
-			  mem_assert->text->operation,
-			  mem_assert->text->right_text);
+	if (!mem_assert->left_value) {
+		string_stream_add(stream,
+				  KUNIT_SUBTEST_INDENT "Expected %s is not null, but is\n",
+				  mem_assert->text->left_text);
+	} else if (!mem_assert->right_value) {
+		string_stream_add(stream,
+				  KUNIT_SUBTEST_INDENT "Expected %s is not null, but is\n",
+				  mem_assert->text->right_text);
+	} else {
+		string_stream_add(stream,
+				KUNIT_SUBTEST_INDENT "Expected %s %s %s, but\n",
+				mem_assert->text->left_text,
+				mem_assert->text->operation,
+				mem_assert->text->right_text);
 
-	string_stream_add(stream, KUNIT_SUBSUBTEST_INDENT "%s ==\n",
-			  mem_assert->text->left_text);
-	kunit_assert_hexdump(stream, mem_assert->left_value,
-			     mem_assert->right_value, mem_assert->size);
+		string_stream_add(stream, KUNIT_SUBSUBTEST_INDENT "%s ==\n",
+				mem_assert->text->left_text);
+		kunit_assert_hexdump(stream, mem_assert->left_value,
+					mem_assert->right_value, mem_assert->size);
 
-	string_stream_add(stream, "\n");
+		string_stream_add(stream, "\n");
 
-	string_stream_add(stream, KUNIT_SUBSUBTEST_INDENT "%s ==\n",
-			  mem_assert->text->right_text);
-	kunit_assert_hexdump(stream, mem_assert->right_value,
-			     mem_assert->left_value, mem_assert->size);
+		string_stream_add(stream, KUNIT_SUBSUBTEST_INDENT "%s ==\n",
+				mem_assert->text->right_text);
+		kunit_assert_hexdump(stream, mem_assert->right_value,
+					mem_assert->left_value, mem_assert->size);
 
-	kunit_assert_print_msg(message, stream);
+		kunit_assert_print_msg(message, stream);
+	}
 }
 EXPORT_SYMBOL_GPL(kunit_mem_assert_format);