diff --git a/TestScripts/C Tests/CtrlTests.h b/TestScripts/C Tests/CtrlTests.h
index 3465f70..ccf0569 100644
--- a/TestScripts/C Tests/CtrlTests.h	
+++ b/TestScripts/C Tests/CtrlTests.h	
@@ -74,6 +74,7 @@ int basicCTRLTest(char** drefs, int ac)
 	{
 		return -30000 + result;
 	}
+    return 0;
 }
 
 int testCTRL_Player()
@@ -143,5 +144,6 @@ int testCTRL_Speedbrakes()
 	{
 		return -30000 + result;
 	}
+    return 0;
 }
 #endif
\ No newline at end of file
diff --git a/TestScripts/C Tests/PosiTests.h b/TestScripts/C Tests/PosiTests.h
index dfc7e07..d8b5673 100644
--- a/TestScripts/C Tests/PosiTests.h	
+++ b/TestScripts/C Tests/PosiTests.h	
@@ -83,6 +83,7 @@ int basicPOSITest(char** drefs, int ac)
 	{
 		return -20000 + result;
 	}
+    return 0;
 }
 
 int testPOSI_Player()
diff --git a/TestScripts/C Tests/SimuTests.h b/TestScripts/C Tests/SimuTests.h
index 1c807b7..0d12012 100644
--- a/TestScripts/C Tests/SimuTests.h	
+++ b/TestScripts/C Tests/SimuTests.h	
@@ -31,6 +31,7 @@ int doSIMUTest(int value, float expected)
 			return -100 - i;
 		}
 	}
+    return 0;
 }
 
 int testSIMU_Basic()