diff --git a/.github/workflows/docs-test.yml b/.github/workflows/docs-test.yml
index b4a33e8b..6acc5bc9 100644
--- a/.github/workflows/docs-test.yml
+++ b/.github/workflows/docs-test.yml
@@ -24,4 +24,4 @@ jobs:
       - uses: DeterminateSystems/nix-installer-action@main
       - uses: DeterminateSystems/magic-nix-cache-action@main
       - name: Run tests
-        run: nix develop --command -- poetry run mkdocs build --strict
+        run: nix develop --command -- poetry install && poetry run mkdocs build --strict