diff --git a/.github/workflows/test_iso.yml b/.github/workflows/test_iso.yml
index ec37f6c..68719bd 100644
--- a/.github/workflows/test_iso.yml
+++ b/.github/workflows/test_iso.yml
@@ -80,7 +80,7 @@ jobs:
         run: |
           sudo apt-get update
           sudo apt-get install -y make
-          sudo make install-test-deps PACKAGE_MANAGER=apt-get
+          sudo make test/iso/install-deps PACKAGE_MANAGER=apt-get
 
       - name: Download generated ISO
         uses: actions/download-artifact@v4
diff --git a/test/Makefile b/test/Makefile
index 3ef6e63..7946d6b 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -9,6 +9,11 @@ $(filter-out README.md Makefile,$(wildcard */*)):
 	$(eval TARGET=$(subst $(DIR)/,,$@))
 	$(MAKE) -w -C $(DIR) $(TARGET)
 
+.DEFAULT:
+	$(eval DIR=$(firstword $(subst /, ,$@)))
+	$(if $(filter-out $(DIR),$@), $(eval TARGET=$(subst $(DIR)/,,$@)),$(eval TARGET=))
+	$(MAKE) -w -C $(DIR) $(TARGET)
+
 install-deps:
 	$(foreach DIR,$(filter-out README.md Makefile,$(wildcard *)),$(MAKE) -w -C $(DIR) install-deps;)