diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index a5bd7fd..51f859e 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -38,14 +38,6 @@ jobs:
       - name: Run default linting script
         run: |
           ./lint.sh
-      - name: Install Ensembl data
-        run: |
-          echo "Before installing Ensembl releases" && df -h
-          pyensembl install --release 75 --species human --custom-mirror https://github.com/openvax/ensembl-data/releases/download/GRCh37.75/
-          pyensembl install --release 81 --species human --custom-mirror https://github.com/openvax/ensembl-data/releases/download/GRCh38.81/
-          pyensembl install --release 95 --species human --custom-mirror https://github.com/openvax/ensembl-data/releases/download/GRCh38.95/
-          pyensembl install --release 95 --species mouse --custom-mirror https://github.com/openvax/ensembl-data/releases/download/GRCm38.95/
-          echo "After installing Ensembl releases" && df -h
       - name: Run unit tests
         run: |
           ./test.sh