diff --git a/.github/workflows/run_tests.yml b/.github/workflows/run_tests.yml
index 6563a62b..430b63f6 100644
--- a/.github/workflows/run_tests.yml
+++ b/.github/workflows/run_tests.yml
@@ -35,6 +35,7 @@ jobs:
         run: |
           poetry export --with dev --output=requirements.txt
           pip install -r requirements.txt
+          pip install -e .
 
       - name: Run mypy
         run: mypy src