diff --git a/lib/spack/spack/test/cmd/buildcache.py b/lib/spack/spack/test/cmd/buildcache.py
index 6f3d0c17817..6cc74f5380a 100644
--- a/lib/spack/spack/test/cmd/buildcache.py
+++ b/lib/spack/spack/test/cmd/buildcache.py
@@ -196,7 +196,7 @@ def test_buildcache_autopush(tmp_path, install_mockery, mock_fetch):
 
 
 def test_buildcache_exclude(tmp_path, install_mockery, mock_fetch):
-    """Test buildcache with autopush"""
+    """Test buildcache with autopush can exclude"""
     mirror_dir = tmp_path / "mirror_a"
 
     mirror(
@@ -213,12 +213,18 @@ def test_buildcache_exclude(tmp_path, install_mockery, mock_fetch):
 
     # Install and generate build cache index
     PackageInstaller([s.package], fake=True, explicit=True).install()
+    found_file = URLBuildcacheEntry.get_manifest_filename(s)
+    missing_file = URLBuildcacheEntry.get_manifest_filename(s["libelf"])
+    found_dirs = os.path.join(
+        *URLBuildcacheEntry.get_relative_path_components(BuildcacheComponent.SPEC), s.name
+    )
+    missing_dirs = os.path.join(
+        *URLBuildcacheEntry.get_relative_path_components(BuildcacheComponent.SPEC),
+        s["libelf"].name,
+    )
 
-    missing_file = spack.binary_distribution.tarball_name(s["libelf"], ".spec.json")
-    found_file = spack.binary_distribution.tarball_name(s, ".spec.json")
-
-    assert (mirror_dir / "build_cache" / found_file).exists()
-    assert not (mirror_dir / "build_cache" / missing_file).exists()
+    assert (mirror_dir / found_dirs / found_file).exists()
+    assert not (mirror_dir / missing_dirs / missing_file).exists()
 
 
 def test_buildcache_sync(