diff --git a/Tests/SimpleInstall/foo.c b/Tests/SimpleInstall/foo.c
index 5c7c3e631..45d5b2bf2 100644
--- a/Tests/SimpleInstall/foo.c
+++ b/Tests/SimpleInstall/foo.c
@@ -1,6 +1,6 @@
 char* foo = "Foo";
 
-int SomeFunctionInFoo(int i)
+int SomeFunctionInFoo()
 {
-  return i + 5;
+  return 5;
 }
diff --git a/Tests/SimpleInstall/foo.h b/Tests/SimpleInstall/foo.h
index bba9022e5..2708baffe 100644
--- a/Tests/SimpleInstall/foo.h
+++ b/Tests/SimpleInstall/foo.h
@@ -3,7 +3,7 @@ extern "C" {
 #endif
 
 extern char* foo;
-extern int SomeFunctionInFoo(int i);
+extern int SomeFunctionInFoo();
 
 #ifdef __cplusplus
 }
diff --git a/Tests/SimpleInstall/inst.cxx b/Tests/SimpleInstall/inst.cxx
index 47d73c0a3..84f2adbe7 100644
--- a/Tests/SimpleInstall/inst.cxx
+++ b/Tests/SimpleInstall/inst.cxx
@@ -18,5 +18,5 @@ int main ()
     return 1;
     }
   printf("Foo: %s\n", foo);
-  return SomeFunctionInFoo(-5);
+  return SomeFunctionInFoo()-5;
 }
diff --git a/Tests/SimpleInstallS2/foo.c b/Tests/SimpleInstallS2/foo.c
index 5c7c3e631..45d5b2bf2 100644
--- a/Tests/SimpleInstallS2/foo.c
+++ b/Tests/SimpleInstallS2/foo.c
@@ -1,6 +1,6 @@
 char* foo = "Foo";
 
-int SomeFunctionInFoo(int i)
+int SomeFunctionInFoo()
 {
-  return i + 5;
+  return 5;
 }
diff --git a/Tests/SimpleInstallS2/foo.h b/Tests/SimpleInstallS2/foo.h
index bba9022e5..2708baffe 100644
--- a/Tests/SimpleInstallS2/foo.h
+++ b/Tests/SimpleInstallS2/foo.h
@@ -3,7 +3,7 @@ extern "C" {
 #endif
 
 extern char* foo;
-extern int SomeFunctionInFoo(int i);
+extern int SomeFunctionInFoo();
 
 #ifdef __cplusplus
 }
diff --git a/Tests/SimpleInstallS2/inst.cxx b/Tests/SimpleInstallS2/inst.cxx
index 47d73c0a3..84f2adbe7 100644
--- a/Tests/SimpleInstallS2/inst.cxx
+++ b/Tests/SimpleInstallS2/inst.cxx
@@ -18,5 +18,5 @@ int main ()
     return 1;
     }
   printf("Foo: %s\n", foo);
-  return SomeFunctionInFoo(-5);
+  return SomeFunctionInFoo()-5;
 }