diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index 9110ee6..8824ceb 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -65,6 +65,9 @@ jobs:
               if: matrix.variant != 'normal' && !startsWith(matrix.variant, 'symfony/symfony')
               run: composer require ${{ matrix.variant }} --no-update
 
+            - name: Allow unstable dependencies
+              run: composer config minimum-stability dev
+
             - name: "Install Composer dependencies (${{ matrix.dependencies }})"
               uses: "ramsey/composer-install@v1"
               with: