diff --git a/.github/plugin/setup/action.yml b/.github/plugin/setup/action.yml
index f629ff8..09eab0d 100644
--- a/.github/plugin/setup/action.yml
+++ b/.github/plugin/setup/action.yml
@@ -63,6 +63,12 @@ runs:
         composer self-update ${{ steps.install-composer1.outputs.COMPOSER_VERSION }}
       shell: bash
 
+    - name: Install specific NVM version
+      run: |
+        # Install nvm v0.39.7 (temp workaround for issue https://github.com/moodlehq/moodle-plugin-ci/issues/309).
+        curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.7/install.sh | bash
+        echo nvm -v
+      shell: bash
     - name: Initialise moodle-plugin-ci
       run: |
         # Initialise moodle-plugin-ci (install via composer)
@@ -94,6 +100,10 @@ runs:
         # Install moodle commands
         echo "::group::Moodle install output"
 
+        # Install nvm v0.39.7 (temp workaround for issue https://github.com/moodlehq/moodle-plugin-ci/issues/309).
+        curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.7/install.sh | bash
+        echo nvm -v
+
         moodle-plugin-ci install -vvv --plugin ./plugin --db-host=127.0.0.1
 
         echo "::endgroup::"