diff --git a/src/TriacOut/TriacOut.c b/src/TriacOut/TriacOut.c
index a72eb08..eae8391 100644
--- a/src/TriacOut/TriacOut.c
+++ b/src/TriacOut/TriacOut.c
@@ -12,6 +12,11 @@
 #include "TriacOut.h"
 #include "RegEdit.h"
 
+
+void Delay_MicroSeconds_impl(double us);
+
+void (*Delay_MicroSeconds)(double us) = &Delay_MicroSeconds_impl;
+
 void TriacOut_InitTimerA(void)
 {
 
@@ -42,3 +47,7 @@ void TriacOut_PulsePins(uint16_t pulse_time)
     RegEdit_ClearBit((void *) &PORTB.OUT, G2);
     RegEdit_ClearBit((void *) &PORTB.OUT, G3);
 }
+
+void Delay_MicroSeconds_impl(double us){
+    return;
+}
diff --git a/tests/TriacOut/test_TriacOut.cpp b/tests/TriacOut/test_TriacOut.cpp
index 8ad3be4..a046645 100644
--- a/tests/TriacOut/test_TriacOut.cpp
+++ b/tests/TriacOut/test_TriacOut.cpp
@@ -18,11 +18,17 @@ extern "C"
 #include "MockRegEdit.h"
 }
 
+
+void FakeDelay(double us)
+{
+    //do Nothing.
+}
+
 TEST_GROUP(test_TriacOut)
 {
     void setup()
     {
-
+        UT_PTR_SET(Delay_MicroSeconds, FakeDelay);
     }
     void teardown()
     {
@@ -78,18 +84,8 @@ TEST(test_TriacOut, TriacOut_SetAllHigh)
     TriacOut_SetAllHigh();
 }
 
-
-void FakeDelay(double us)
-{
-    //do Nothing.
-}
-
-
-
 TEST(test_TriacOut, TriacOut_PulsePins)
 {
-    UT_PTR_SET(Delay_MicroSeconds, FakeDelay);
-
 
     //Expect that pin PA1 is set to output
     mock().expectOneCall("RegEdit_ClearBit")