diff --git a/src/test/c/test_calculator.c b/src/test/c/test_calculator.c
index 370fcd4..89738cc 100644
--- a/src/test/c/test_calculator.c
+++ b/src/test/c/test_calculator.c
@@ -214,7 +214,7 @@ void test_BinToDec(void) {
     long long int result;
 
     // Act
-    result = DecToBin(100);
+    result = BinToDec(100);
 
     // Assert
     TEST_ASSERT_EQUAL_INT64(8, result);