diff --git a/math/fibonacci.cpp b/math/fibonacci.cpp
index e15cfc0ccff9b75da01f58d47011e7fa2c5f7130..493523b612d64480d6baa487313f8175ac2fa249 100644
--- a/math/fibonacci.cpp
+++ b/math/fibonacci.cpp
@@ -14,7 +14,7 @@
 /**
  * Recursively compute sequences
  */
-int fibonacci(unsigned int n) {
+unsigned int fibonacci(unsigned int n) {
     /* If the input is 0 or 1 just return the same
        This will set the first 2 values of the sequence */
     if (n <= 1)
@@ -24,8 +24,40 @@ int fibonacci(unsigned int n) {
     return fibonacci(n - 1) + fibonacci(n - 2);
 }
 
+/**
+ * Function for testing the fibonacci() function with a few
+ * test cases and assert statement.
+ * @returns `void`
+*/
+static void test() {
+    unsigned int test_case_1 = fibonacci(0);
+    assert(test_case_1 == 0);
+    std::cout << "Passed Test 1!" << std::endl;
+
+    unsigned int test_case_2 = fibonacci(1);
+    assert(test_case_2 == 1);
+    std::cout << "Passed Test 2!" << std::endl;
+
+    unsigned int test_case_3 = fibonacci(2);
+    assert(test_case_3 == 1);
+    std::cout << "Passed Test 3!" << std::endl;
+
+    unsigned int test_case_4 = fibonacci(3);
+    assert(test_case_4 == 2);
+    std::cout << "Passed Test 4!" << std::endl;
+
+    unsigned int test_case_5 = fibonacci(4);
+    assert(test_case_5 == 3);
+    std::cout << "Passed Test 5!" << std::endl;
+
+    unsigned int test_case_6 = fibonacci(15);
+    assert(test_case_6 == 610);
+    std::cout << "Passed Test 6!" << std::endl << std::endl;
+}
+
 /// Main function
 int main() {
+    test();
     int n;
     std::cin >> n;
     assert(n >= 0);