diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index e01bb4a4..67b02f9a 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -42,6 +42,7 @@ jobs:
           conda config --set always_yes yes --set changeps1 no
           conda config --add channels conda-forge
           conda install --file requirements/run.txt
+          conda install --file requirements/test.txt
           pip install .
 
       - name: Validate pdfmorph