diff --git a/tests/commonlib/bsd/Makefile.inc b/tests/commonlib/bsd/Makefile.inc
index 56664d0..bf17b6d 100644
--- a/tests/commonlib/bsd/Makefile.inc
+++ b/tests/commonlib/bsd/Makefile.inc
@@ -1,5 +1,9 @@
 # SPDX-License-Identifier: GPL-2.0-only
 
 tests-y += helpers-test
+tests-y += gcd-test
 
 helpers-test-srcs += tests/commonlib/bsd/helpers-test.c
+
+gcd-test-srcs += tests/commonlib/bsd/gcd-test.c
+gcd-test-srcs += src/commonlib/bsd/gcd.c