diff --git a/pkgs/servers/home-assistant/default.nix b/pkgs/servers/home-assistant/default.nix
index e19919bf4f8..d3aa10620b8 100644
--- a/pkgs/servers/home-assistant/default.nix
+++ b/pkgs/servers/home-assistant/default.nix
@@ -425,6 +425,8 @@ in with py.pkgs; buildPythonApplication rec {
     "--only-rerun RuntimeError"
     # assign tests grouped by file to workers
     "--dist loadfile"
+    # enable full variable printing on error
+    "--showlocals"
     # tests are located in tests/
     "tests"
     # screenlogic/test_config_flow.py: Tries to send out UDP broadcasts