diff --git a/osbuild/testutil/__init__.py b/osbuild/testutil/__init__.py
index cdaf8492..b429f343 100644
--- a/osbuild/testutil/__init__.py
+++ b/osbuild/testutil/__init__.py
@@ -6,3 +6,10 @@ import shutil
 
 def has_executable(executable: str) -> bool:
     return shutil.which(executable) is not None
+
+
+def assert_dict_has(v, keys, expected_value):
+    for key in keys.split("."):
+        assert key in v
+        v = v[key]
+    assert v == expected_value