diff --git a/.github/workflows/server-ci.yml b/.github/workflows/server-ci.yml
index 5ca710d3120..2c80b1761fb 100644
--- a/.github/workflows/server-ci.yml
+++ b/.github/workflows/server-ci.yml
@@ -208,6 +208,7 @@ jobs:
       logsartifact: postgres-binary-server-test-logs
       go-version: ${{ needs.go.outputs.version }}
       fips-enabled: false
+      fullyparallel: false
   # -- Sharded into 4 parallel runners for ~88% wall-time improvement --
   test-postgres-normal:
     name: Postgres (shard ${{ matrix.shard }})