diff --git a/test/conversionOfNumbers/test_conversionOfNumbers.c b/test/conversionOfNumbers/test_conversionOfNumbers.c
index fe9441a..4bf3272 100644
--- a/test/conversionOfNumbers/test_conversionOfNumbers.c
+++ b/test/conversionOfNumbers/test_conversionOfNumbers.c
@@ -62,4 +62,16 @@ void test_binaryStringLengthOfInputNegative10is5(){
 
     //assert
     TEST_ASSERT_EQUAL_INT(expected, result);
+}
+
+void test_convertNegative12ToBinaryStrNegative1100(){
+    //arrange
+    char* result;
+    char expected[] = "-1100";
+
+    //act
+    result = convertIntToBinaryStr(-12);
+
+    //assert
+    TEST_ASSERT_EQUAL_STRING(expected, result);
 }
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