diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 4a0b26c57ea2..a5aff70220c6 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -24,6 +24,8 @@ jobs:
         os: [ubuntu-latest]
         node: [18, 20]
         experimental: [false]
+        shardIndex: [1, 2, 3, 4]
+        shardTotal: [4]
         # include:
         #   - os: windows-latest
         #     node: 16
@@ -80,6 +82,7 @@ jobs:
         run: |
           node -v
           npm -v
-          yarn test --silent
+          yarn test --silent --shard=${{ matrix.shardIndex}}/${{ matrix.shardTotal }}
         env:
           SANITY_CI_CLI_AUTH_TOKEN: ${{ secrets.SANITY_CI_CLI_AUTH_TOKEN }}
+          GITHUB_SHARD_IDENTIFIER: ${{ matrix.shardIndex }}_${{ matrix.shardTotal }}
diff --git a/packages/@sanity/cli/test/shared/environment.ts b/packages/@sanity/cli/test/shared/environment.ts
index eda5681eabb1..4710470835a9 100644
--- a/packages/@sanity/cli/test/shared/environment.ts
+++ b/packages/@sanity/cli/test/shared/environment.ts
@@ -58,7 +58,7 @@ const getTestId = () => {
 
   const localId = readFileSync(testIdPath, 'utf8').trim()
   const ghRunId = `${process.env.GITHUB_RUN_ID || ''}`.slice(-4)
-  const ghId = `${ghRunId}-${process.env.GITHUB_RUN_NUMBER}-${process.env.GITHUB_RUN_ATTEMPT}`
+  const ghId = `${ghRunId}-${process.env.GITHUB_RUN_NUMBER}-${process.env.GITHUB_RUN_ATTEMPT}-${process.env.GITHUB_SHARD_IDENTIFIER}`
   const githubId = process.env.GITHUB_RUN_ID ? `gh-${ghId}` : ''
   const runId = `${githubId || localId}`.replace(/\W/g, '-').replace(/(^-+|-+$)/g, '')