diff --git a/src/outputHandling.h b/src/outputHandling.h
index 4647485..77ff505 100644
--- a/src/outputHandling.h
+++ b/src/outputHandling.h
@@ -3,6 +3,8 @@
 
 #include "inputHandling.h"
 
+extern void buildHexString(char* string, int num);
+extern void buildOctString(char* string, int num);
 extern void showResult(calc_op* res);
 
 #endif // OUTPUTHANDLING_H
diff --git a/test/test_outputHandling.c b/test/test_outputHandling.c
index 8735cd7..7ea50e5 100644
--- a/test/test_outputHandling.c
+++ b/test/test_outputHandling.c
@@ -4,6 +4,8 @@
 
 #include "outputHandling.h"
 
+char string[100]= {0};
+
 void setUp(void)
 {
 }
@@ -12,9 +14,10 @@ void tearDown(void)
 {
 }
 
-void test_outputHandling_NeedToImplement(void)
+void test_outputHandling_buildOctString(void)
 {
-    TEST_IGNORE_MESSAGE("Need to Implement outputHandling");
+    buildOctString(string, 5555555);
+    TEST_ASSERT_EQUAL_STRING("25142543", string);
 }
 
 #endif // TEST