diff --git a/.github/workflows/spark_test.yaml b/.github/workflows/spark_test.yaml
index 3d0b61c3ab..e4078913a2 100644
--- a/.github/workflows/spark_test.yaml
+++ b/.github/workflows/spark_test.yaml
@@ -7,13 +7,13 @@ jobs:
     strategy:
       matrix:
         # These Scala versions must match those in the build.sbt
-        scala: [2.12.18, 2.13.13]
+        scala: [2.13.13]
         # Important: This list of shards must be [0..NUM_SHARDS - 1]
-        shard: [0, 1, 2, 3]
+        shard: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
     env:
       SCALA_VERSION: ${{ matrix.scala }}
       # Important: This must be the same as the length of shards in matrix
-      NUM_SHARDS: 4
+      NUM_SHARDS: 10
     steps:
       - uses: actions/checkout@v3
       - uses: technote-space/get-diff-action@v4