diff --git a/.github/workflows/python-tests.yml b/.github/workflows/python-tests.yml
index 4872797e7..9b3a72d7d 100644
--- a/.github/workflows/python-tests.yml
+++ b/.github/workflows/python-tests.yml
@@ -48,7 +48,7 @@ jobs:
         path: ${{ env.CONDA }}/envs
         key: conda-${{ matrix.os }}-${{ matrix.python-version }}-${{ env.cache_date }}-${{ hashFiles('dev-environment.yml') }}-${{ env.CACHE_NUMBER }}
       env:
-        CACHE_NUMBER: 0 # Increase this value to reset cache if environment.yml has not changed
+        CACHE_NUMBER: 1 # Increase this value to reset cache if environment.yml has not changed
       id: cache
 
     # The trick below is necessary because the generic environment file does not specify a Python version, and ONLY