diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 8081b74..bb4a96d 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -21,6 +21,11 @@ jobs:
         with:
           python-version: "3.12"
 
+      - name: Install lint test dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install --ignore-installed .
+
       - name: Run lint test suite
         run: python -m unittest discover -s tests/lint -t .
 
diff --git a/Makefile b/Makefile
index 28badb2..4c2d886 100644
--- a/Makefile
+++ b/Makefile
@@ -185,7 +185,7 @@ lint-shell:
 	docker run --rm -v "$$PWD:/mnt" -w /mnt koalaman/shellcheck:stable scripts/*.sh
 
 .PHONY: test-lint
-test-lint:
+test-lint: install
 	# Run lint guardrail tests.
 	$(PYTHON) -m unittest discover -s tests/lint -t .