diff --git a/.github/workflows/perf-check.yml b/.github/workflows/perf-check.yml
index e06866ecdc5..58b55013e09 100644
--- a/.github/workflows/perf-check.yml
+++ b/.github/workflows/perf-check.yml
@@ -26,7 +26,7 @@ jobs:
           git show --format=short --no-patch $originSha
       - uses: tracerbench/tracerbench-compare-action@update-configurability
         with:
-          control-sha: git rev-parse --short=8 origin/runspired/simpler-relationships
+          control-sha: $(git rev-parse --short=8 origin/runspired/simpler-relationships)
           experiment-build-command: yarn workspace relationship-performance-test-app ember build -e production --output-path dist-experiment
           experiment-serve-command: yarn workspace relationship-performance-test-app ember s --path dist-experiment --port 4201
           control-build-command: yarn workspace relationship-performance-test-app ember build -e production --output-path dist-control