diff --git a/make/topdir.mk b/make/topdir.mk
index aaad268b..1b6fff2b 100644
--- a/make/topdir.mk
+++ b/make/topdir.mk
@@ -217,6 +217,9 @@ pkg-install-build-deps:
 pkg-install-release-deps:
 	$(PKG_MANAGER_SH) install $(DASH_Y) $(BASE_PKGS) $(shell $(proj_query_cmd) required-os-pkg --skip-excluded --flavours "build run release" $(PROJECT))
 
+pkg-install-testbuild-deps:
+	$(PKG_MANAGER_SH) install $(DASH_Y) $(BASE_PKGS) $(shell $(proj_query_cmd) pkg-requires --delimiter=' ' --no-version build,run,release $(PROJECT))
+
 echo-hash:
 	@/bin/bash $(PKG_SH_EXE) hash