diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index ad92c078..aad4ff16 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -38,15 +38,11 @@ jobs:
 
     - name: Run unit tests
       run: |
-        python -m pytest test
+        make unit-test
 
-    - name: Test snakemake workflow for compile_cost_assumptions
+    - name: Test snakemake workflows
       run: |
-        snakemake --cores all -f compile_cost_assumptions
-
-    - name: Test snakemake workflow for compile_cost_assumptions_usa
-      run: |
-        snakemake --cores all -f compile_cost_assumptions_usa
+        make test
 
     - name: Upload artifacts
       uses: actions/upload-artifact@v4
diff --git a/Makefile b/Makefile
new file mode 100644
index 00000000..2f5cf53a
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,19 @@
+# SPDX-FileCopyrightText: Contributors to technology-data <https://github.com/pypsa/technology-data>
+#
+# SPDX-License-Identifier: GPL-3.0-only
+
+# coding: utf-8
+
+.ONESHELL:
+
+.PHONY: test unit-test
+
+# Run default tests
+test:
+	set -e
+	snakemake --cores all -f compile_cost_assumptions --configfile config.yaml
+	snakemake --cores all -f compile_cost_assumptions_usa --configfile config.yaml
+	echo "All tests completed successfully."
+
+unit-test:
+	pytest test