diff --git a/p11-kit/tests/test-init.c b/p11-kit/tests/test-init.c
index 7df4be9..557d0c2 100644
--- a/p11-kit/tests/test-init.c
+++ b/p11-kit/tests/test-init.c
@@ -274,7 +274,7 @@ test_load_and_initialize (CuTest *tc)
 	CK_RV rv;
 	int ret;
 
-	rv = p11_kit_load_initialize_module (BUILDDIR "/.libs/mock-one" SHLEXT, &module);
+	rv = p11_kit_load_initialize_module (BUILDDIR "/.libs/mock-one.so", &module);
 	CuAssertTrue (tc, rv == CKR_OK);
 	CuAssertTrue (tc, module != NULL);