diff --git a/.github/workflows/cache-test.sh b/.github/workflows/cache-test.sh
index c1f7eb1..49e687b 100755
--- a/.github/workflows/cache-test.sh
+++ b/.github/workflows/cache-test.sh
@@ -1,12 +1,45 @@
-#!/bin/sh
+#! /usr/bin/env bash
 
 set -e
 set -ux
 
 seed=$(date)
 
+log=$MAGIC_NIX_CACHE_DAEMONDIR/daemon.log
+
+binary_cache=https://attic-test.fly.dev
+
+# Check that the action initialized correctly.
+grep 'FlakeHub cache is enabled' $log
+grep 'Using cache' $log
+grep 'GitHub Action cache is enabled' $log
+
+# Build something.
 outpath=$(nix-build .github/workflows/cache-tester.nix --argstr seed "$seed")
+
+# Check that the path was enqueued to be pushed to the cache.
+grep "Enqueueing.*$outpath" $log
+
+# Wait until it has been pushed succesfully.
+found=
+for ((i = 0; i < 60; i++)); do
+    sleep 1
+    if grep "✅ $(basename $outpath)" $log; then
+        found=1
+        break
+    fi
+done
+if [[ -z $found ]]; then
+    echo "FlakeHub push did not happen." >&2
+    exit 1
+fi
+
+# Check the FlakeHub binary cache to see if the path is really there.
+nix path-info --store "$binary_cache" $outpath
+
+# FIXME: remove this once the daemon also uploads to GHA automatically.
 nix copy --to 'http://127.0.0.1:37515' "$outpath"
+
 rm ./result
 nix store delete "$outpath"
 if [ -f "$outpath" ]; then