diff --git a/test/test_convert_ton_to_mt.c b/test/test_convert_ton_to_mt.c
new file mode 100644
index 0000000..bce3793
--- /dev/null
+++ b/test/test_convert_ton_to_mt.c
@@ -0,0 +1,20 @@
+#include "unity.h" // Include the Unity header file
+#include "../src/convert_ton_to_mt.h" // Include the header file containing the function to be tested
+
+// Test setup function
+void setUp(void) {
+    // This function will be called before each test
+}
+
+// Test teardown function
+void tearDown(void) {
+    // This function will be called after each test
+}
+
+// Test case for tons_to_megatons function
+void test_tons_to_megatons(void) {
+    // Test case
+    double input = 2500000; // 2.5 million tons
+    double expected_output = 2.5; // 2.5 megatons
+    TEST_ASSERT_EQUAL_DOUBLE(expected_output, tons_to_megatons(input));
+}