diff --git a/src/controller.test.cpp b/src/controller.test.cpp
index fbd690f9c82449c161662aca5ce119ec34776e94..228c355505d93d50c34411dea367edb77440a59e 100644
--- a/src/controller.test.cpp
+++ b/src/controller.test.cpp
@@ -6,6 +6,7 @@ extern "C" {
 TEST_CASE("PI_Regler") {
     REQUIRE(controller(8, 0, 500) == 16);
     REQUIRE(controller(-2, 0, 500) == -4);
+    REQUIRE(controller(0, 2, 500) == -4);
 }
 
 TEST_CASE("limits") {