diff --git a/.github/test-suite/determine_gosop_branch.sh b/.github/test-suite/determine_gosop_branch.sh
index d3525783..2c47d065 100755
--- a/.github/test-suite/determine_gosop_branch.sh
+++ b/.github/test-suite/determine_gosop_branch.sh
@@ -3,5 +3,5 @@ VERSION=$(awk '/^module github.com\/ProtonMail\/gopenpgp\/v[0-9]+/ {print $NF}'
 if [ "$VERSION" -eq 3 ]; then
   echo "gosop-gopenpgp-v3"
 else
-  echo "main"
+  echo "gosop-gopenpgp-v2"
 fi
diff --git a/.github/workflows/sop-test-suite.yml b/.github/workflows/sop-test-suite.yml
index 6ed7aede..db9052de 100644
--- a/.github/workflows/sop-test-suite.yml
+++ b/.github/workflows/sop-test-suite.yml
@@ -46,7 +46,7 @@ jobs:
     name: Run interoperability test suite
     runs-on: ubuntu-latest
     container: 
-      image: ghcr.io/protonmail/openpgp-interop-test-docker:v1.1.7
+      image: ghcr.io/protonmail/openpgp-interop-test-docker:v1.1.9
       credentials:
         username: ${{ github.actor }}
         password: ${{ secrets.github_token }}