diff --git a/tests/test_tutorial/test_header_param_models/test_tutorial001.py b/tests/test_tutorial/test_header_param_models/test_tutorial001.py
index 06b2404cf..bc876897b 100644
--- a/tests/test_tutorial/test_header_param_models/test_tutorial001.py
+++ b/tests/test_tutorial/test_header_param_models/test_tutorial001.py
@@ -129,13 +129,13 @@ def test_openapi_schema(client: TestClient):
                                 "schema": {"type": "string", "title": "Host"},
                             },
                             {
-                                "name": "save_data",
+                                "name": "save-data",
                                 "in": "header",
                                 "required": True,
                                 "schema": {"type": "boolean", "title": "Save Data"},
                             },
                             {
-                                "name": "if_modified_since",
+                                "name": "if-modified-since",
                                 "in": "header",
                                 "required": False,
                                 "schema": IsDict(
@@ -171,7 +171,7 @@ def test_openapi_schema(client: TestClient):
                                 ),
                             },
                             {
-                                "name": "x_tag",
+                                "name": "x-tag",
                                 "in": "header",
                                 "required": False,
                                 "schema": {
diff --git a/tests/test_tutorial/test_header_param_models/test_tutorial002.py b/tests/test_tutorial/test_header_param_models/test_tutorial002.py
index e07655a0c..0615521c4 100644
--- a/tests/test_tutorial/test_header_param_models/test_tutorial002.py
+++ b/tests/test_tutorial/test_header_param_models/test_tutorial002.py
@@ -140,13 +140,13 @@ def test_openapi_schema(client: TestClient):
                                 "schema": {"type": "string", "title": "Host"},
                             },
                             {
-                                "name": "save_data",
+                                "name": "save-data",
                                 "in": "header",
                                 "required": True,
                                 "schema": {"type": "boolean", "title": "Save Data"},
                             },
                             {
-                                "name": "if_modified_since",
+                                "name": "if-modified-since",
                                 "in": "header",
                                 "required": False,
                                 "schema": IsDict(
@@ -182,7 +182,7 @@ def test_openapi_schema(client: TestClient):
                                 ),
                             },
                             {
-                                "name": "x_tag",
+                                "name": "x-tag",
                                 "in": "header",
                                 "required": False,
                                 "schema": {