diff --git a/reactos/apps/tests/event/event.c b/reactos/apps/tests/event/event.c
index 0aaa51d6a58..9942bea0745 100644
--- a/reactos/apps/tests/event/event.c
+++ b/reactos/apps/tests/event/event.c
@@ -11,7 +11,7 @@ DWORD WINAPI thread( LPVOID crap )
 	return 1;
 }
 
-int main()
+int main( void )
 {
 	DWORD id, Status;
 	printf( "Creating events\n" );
diff --git a/reactos/apps/tests/file/file.c b/reactos/apps/tests/file/file.c
index 75531949b9c..fc05d84c698 100644
--- a/reactos/apps/tests/file/file.c
+++ b/reactos/apps/tests/file/file.c
@@ -4,8 +4,9 @@
 
 #include <windows.h>
 #include <stdlib.h>
+#include <stdio.h>
 
-int main()
+int main( void )
 {
    HANDLE file;
    char buffer[4096];
@@ -47,4 +48,6 @@ int main()
      }
    
    printf("Finished\n");
+
+   return 0;
 }
diff --git a/reactos/apps/tests/file/file.cpp b/reactos/apps/tests/file/file.cpp
index 8c0e70677b0..3f4cb127260 100644
--- a/reactos/apps/tests/file/file.cpp
+++ b/reactos/apps/tests/file/file.cpp
@@ -6,7 +6,7 @@
 #include <iostream>
 #include <stdlib.h>
 
-int main()
+int main( void )
 {
   HANDLE file = CreateFile( "test.dat", GENERIC_READ | GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, 0, 0 );
   char buffer[4096];
@@ -34,4 +34,6 @@ int main()
       exit(3);
     }
   cout << "Test passed" << endl;
+
+  return 0;
 }