diff --git a/.github/workflows/build_and_test.yml b/.github/workflows/build_and_test.yml
index c53cbada7d..3ce5d9c2b3 100644
--- a/.github/workflows/build_and_test.yml
+++ b/.github/workflows/build_and_test.yml
@@ -473,8 +473,12 @@ jobs:
           BUILD_TAG: ${{ needs.tag.outputs.build-tag }}
           PAGESERVER_VIRTUAL_FILE_IO_ENGINE: std-fs
 
+      # Temporary disable this step until we figure out why it's so flaky
+      # Ref https://github.com/neondatabase/neon/issues/4540
       - name: Merge and upload coverage data
-        if: matrix.build_type == 'debug' && matrix.pg_version == 'v14'
+        if: |
+          false &&
+          matrix.build_type == 'debug' && matrix.pg_version == 'v14'
         uses: ./.github/actions/save-coverage-data
 
   get-benchmarks-durations:
diff --git a/scripts/comment-test-report.js b/scripts/comment-test-report.js
index 89befda71f..f42262cf48 100755
--- a/scripts/comment-test-report.js
+++ b/scripts/comment-test-report.js
@@ -188,7 +188,7 @@ const reportSummary = async (params) => {
 }
 
 const parseCoverageSummary = async ({ summaryJsonUrl, coverageUrl, fetch }) => {
-    let summary = `\n### Code coverage ([full report](${coverageUrl}))\n`
+    let summary = `\n### Code coverage* ([full report](${coverageUrl}))\n`
 
     const coverage = await (await fetch(summaryJsonUrl)).json()
     for (const covType of Object.keys(coverage).sort()) {
@@ -198,7 +198,7 @@ const parseCoverageSummary = async ({ summaryJsonUrl, coverageUrl, fetch }) => {
 
         summary += `- \`${covType}s\`: \`${coverage[covType]["_summary"]}\`\n`
     }
-
+    summary += "\n\\* collected from Rust tests only\n"
     summary += `\n___\n`
 
     return summary