diff --git a/tests/mock_vws/test_authorization_header.py b/tests/mock_vws/test_authorization_header.py
index 3c18e914c..2f9367f62 100644
--- a/tests/mock_vws/test_authorization_header.py
+++ b/tests/mock_vws/test_authorization_header.py
@@ -38,7 +38,7 @@ def test_missing(endpoint: Endpoint) -> None:
         is given.
         """
         date = rfc_1123_date()
-        new_headers = {
+        new_headers: dict[str, str] = {
             **endpoint.headers,
             "Date": date,
         }
diff --git a/tests/mock_vws/test_date_header.py b/tests/mock_vws/test_date_header.py
index d5e5f0b45..0bf55ac4e 100644
--- a/tests/mock_vws/test_date_header.py
+++ b/tests/mock_vws/test_date_header.py
@@ -46,7 +46,7 @@ def test_no_date_header(endpoint: Endpoint) -> None:
             request_path=endpoint.path_url,
         )
 
-        new_headers = {
+        new_headers: dict[str, str] = {
             **endpoint.headers,
             "Authorization": authorization_string,
         }