diff --git a/.github/workflows/tests_primary.yml b/.github/workflows/tests_primary.yml
index 343b0c9932..bec063425a 100644
--- a/.github/workflows/tests_primary.yml
+++ b/.github/workflows/tests_primary.yml
@@ -135,10 +135,10 @@ jobs:
         include:
           - os: ubuntu-latest
             node-version: 18
-            shard: [1/2]
+            shard: 1/2
           - os: ubuntu-latest
             node-version: 18
-            shard: [2/2]
+            shard: 2/2
     runs-on: ${{ matrix.os }}
     steps:
     - uses: actions/checkout@v3