diff --git a/filesystem/tests/interface.cpp b/filesystem/tests/interface.cpp
new file mode 100644
index 00000000..3a221fe7
--- /dev/null
+++ b/filesystem/tests/interface.cpp
@@ -0,0 +1,61 @@
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include "port.h"
+#include "build.h"
+#include "VFileSystem009.h"
+#include "filesystem.h"
+
+#if XASH_POSIX
+#include <dlfcn.h>
+#define LoadLibrary( x ) dlopen( x, RTLD_NOW )
+#define GetProcAddress( x, y ) dlsym( x, y )
+#define FreeLibrary( x ) dlclose( x )
+#elif XASH_WIN32
+#include <windows.h>
+#endif
+
+void *g_hModule;
+FSAPI g_pfnGetFSAPI;
+typedef void *(*pfnCreateInterface_t)( const char *, int * );
+pfnCreateInterface_t g_pfnCreateInterface;
+fs_api_t g_fs;
+fs_globals_t *g_nullglobals;
+
+static qboolean LoadFilesystem( void )
+{
+	int temp = -1;
+
+	g_hModule = LoadLibrary( "filesystem_stdio." OS_LIB_EXT );
+	if( !g_hModule )
+		return false;
+
+	// check our C-style interface existence
+	g_pfnGetFSAPI = (FSAPI)GetProcAddress( g_hModule, GET_FS_API );
+	if( !g_pfnGetFSAPI )
+		return false;
+
+	if( !g_pfnGetFSAPI( FS_API_VERSION, &g_fs, &g_nullglobals, NULL ))
+		return false;
+
+	// check Valve-style interface existence
+	g_pfnCreateInterface = (pfnCreateInterface_t)GetProcAddress( g_hModule, "CreateInterface" );
+	if( !g_pfnCreateInterface )
+		return false;
+
+	if( !g_pfnCreateInterface( "VFileSystem009", &temp ) || temp != 0 )
+		return false;
+
+	if( !g_pfnCreateInterface( FS_API_CREATEINTERFACE_TAG, &temp ) || temp != 0 )
+		return false;
+
+	return true;
+}
+
+int main( void )
+{
+	if( !LoadFilesystem() )
+		return EXIT_FAILURE;
+
+	return EXIT_SUCCESS;
+}