diff --git a/include/mtl/tests/fixed.hpp b/include/mtl/tests/fixed.hpp
index 63b5774..f330cff 100644
--- a/include/mtl/tests/fixed.hpp
+++ b/include/mtl/tests/fixed.hpp
@@ -24,7 +24,10 @@ public:
 	}
 
 	static bool construction() {
-		return fixed(7).raw() == 7 * 64;
+		start_timer();
+		bool r = fixed(7).raw() == 7 * 64;
+		end_timer();
+		return r;
 	}
 
 	// All tests are placed in IWRAM in ARM mode.
diff --git a/src/tests/fixed.cpp b/src/tests/fixed.cpp
index 6f14fef..853a8b8 100644
--- a/src/tests/fixed.cpp
+++ b/src/tests/fixed.cpp
@@ -11,7 +11,10 @@ namespace test{
 bool fixed_suite::addition() {
 	struct {
 		NOINLINE fixed operator()(fixed x, fixed y) {
-			return x + y;
+			start_timer();
+			fixed r = x + y;
+			end_timer();
+			return r;
 		}
 	} f;
 
@@ -21,7 +24,10 @@ bool fixed_suite::addition() {
 bool fixed_suite::subtraction() {
 	struct {
 		NOINLINE fixed operator()(fixed x, fixed y) {
-			return x - y;
+			start_timer();
+			fixed r = x - y;
+			end_timer();
+			return r;
 		}
 	} f;
 
@@ -31,7 +37,10 @@ bool fixed_suite::subtraction() {
 bool fixed_suite::multiplication() {
 	struct {
 		NOINLINE fixed operator()(fixed x, fixed y) {
-			return x * y;
+			start_timer();
+			fixed r = x * y;
+			end_timer();
+			return r;
 		}
 	} f;
 
@@ -44,7 +53,10 @@ bool fixed_suite::mult_overflow() {
 	// is used internally)
 	struct {
 		NOINLINE fixed operator()(fixed x, fixed y) {
-			return x * y;
+			start_timer();
+			fixed r = x * y;
+			end_timer();
+			return r;
 		}
 	} f;
 
@@ -54,7 +66,10 @@ bool fixed_suite::mult_overflow() {
 bool fixed_suite::division() {
 	struct {
 		NOINLINE fixed operator()(fixed x, fixed y) {
-			return x / y;
+			start_timer();
+			fixed r = x / y;
+			end_timer();
+			return r;
 		}
 	} f;