diff --git a/src/multiplication/multiplication.h b/src/multiplication/multiplication.h
index 697e80f..295da10 100644
--- a/src/multiplication/multiplication.h
+++ b/src/multiplication/multiplication.h
@@ -1,7 +1,7 @@
 #ifndef multiplication_H
 #define multiplication_H
 
-int multiplication(int a, int b);
+int multiply(int a, int b);
 
 #endif
 
diff --git a/test/multiplication/test_calculator.c b/test/multiplication/test_calculator.c
deleted file mode 100644
index 8b13789..0000000
--- a/test/multiplication/test_calculator.c
+++ /dev/null
@@ -1 +0,0 @@
-
diff --git a/test/multiplication/test_multiplication.c b/test/multiplication/test_multiplication.c
new file mode 100644
index 0000000..e02bb41
--- /dev/null
+++ b/test/multiplication/test_multiplication.c
@@ -0,0 +1,12 @@
+#include "unity.h"
+#include "multiplication.h"
+
+void setUp(void){}
+void tearDown(void){}
+
+void test_multiplication() {
+    TEST_ASSERT_EQUAL_INT(6, multiply(2, 3));
+    TEST_ASSERT_EQUAL_INT(-6, multiply(2, -3));
+    TEST_ASSERT_EQUAL_INT(0, multiply(0, 0));
+}
+