diff --git a/aiopenapi3/extra.py b/aiopenapi3/extra.py
index e451a756..a5dc140c 100644
--- a/aiopenapi3/extra.py
+++ b/aiopenapi3/extra.py
@@ -18,6 +18,7 @@ def __init__(
             Union[Tuple[Union[re.Pattern, str], Optional[List[Union[re.Pattern, str]]]], Union[re.Pattern, str]]
         ],
     ) -> None:
+        assert isinstance(operations, list), type(operations)
         self.operations = operations
         super().__init__()
 
@@ -38,7 +39,7 @@ def _reduced_paths(self, ctx: "Document.Context") -> dict:
                             if path_key not in reduced:
                                 reduced[path_key] = {k: v for k, v in path_value.items() if k in keep_keys}
                             reduced[path_key][operation_key] = operation_value
-            else:
+            elif isinstance(operation, tuple) and len(operation) == 2:
                 pattern, operation_patterns = operation
                 for path_key in ctx.document["paths"].keys():
                     if (isinstance(pattern, str) and pattern == path_key) or (
@@ -55,6 +56,8 @@ def _reduced_paths(self, ctx: "Document.Context") -> dict:
                                 for op_pattern in operation_patterns
                             )
                         }
+            else:
+                raise TypeError(operation)
         return reduced
 
     def parsed(self, ctx: "Document.Context") -> "Document.Context":
diff --git a/tests/extra_test.py b/tests/extra_test.py
index 120f7aa6..d0e9b798 100644
--- a/tests/extra_test.py
+++ b/tests/extra_test.py
@@ -123,11 +123,12 @@ def test_reduced(with_extra_reduced, httpx_mock, compressor):
     assert "A" in api.components.responses
     assert "A" in api.components.requestBodies
 
+    # (str, methods)
     api = OpenAPI.load_file(
         "http://127.0.0.1/api.yaml",
         with_extra_reduced,
         session_factory=httpx.Client,
-        plugins=[compressor({"/A/{Path}": None})],
+        plugins=[compressor([("/A/{Path}", None)])],
         loader=FileSystemLoader(Path("tests/fixtures")),
     )
 
@@ -151,11 +152,12 @@ def test_reduced(with_extra_reduced, httpx_mock, compressor):
     assert payload.a == 1
     assert headers["X-A"] == "A"
 
+    # (re, methods)
     api = OpenAPI.load_file(
         "http://127.0.0.1/api.yaml",
         with_extra_reduced,
         session_factory=httpx.Client,
-        plugins=[compressor({re.compile("/B"): None})],
+        plugins=[compressor([(re.compile("/B"), None)])],
         loader=FileSystemLoader(Path("tests/fixtures")),
     )
     assert "/A/{Path}" not in api.paths.paths
@@ -163,3 +165,39 @@ def test_reduced(with_extra_reduced, httpx_mock, compressor):
     assert "A" not in api.components.schemas
     assert "A" not in api.components.responses
     assert "A" not in api.components.requestBodies
+
+    # operationId str
+    api = OpenAPI.load_file(
+        "http://127.0.0.1/api.yaml",
+        with_extra_reduced,
+        session_factory=httpx.Client,
+        plugins=[compressor(["A"])],
+        loader=FileSystemLoader(Path("tests/fixtures")),
+    )
+    assert "/A/{Path}" in api.paths.paths
+    assert "A" in api.components.parameters
+    assert "AA" in api.components.schemas
+    assert "A" in api.components.schemas
+
+    assert "A0" in api.components.schemas
+    assert "A1" in api.components.schemas
+    assert "A" in api.components.responses
+    assert "A" in api.components.requestBodies
+
+    # operationId re
+    api = OpenAPI.load_file(
+        "http://127.0.0.1/api.yaml",
+        with_extra_reduced,
+        session_factory=httpx.Client,
+        plugins=[compressor([re.compile(r"[A]{1}$")])],
+        loader=FileSystemLoader(Path("tests/fixtures")),
+    )
+    assert "/A/{Path}" in api.paths.paths
+    assert "A" in api.components.parameters
+    assert "AA" in api.components.schemas
+    assert "A" in api.components.schemas
+
+    assert "A0" in api.components.schemas
+    assert "A1" in api.components.schemas
+    assert "A" in api.components.responses
+    assert "A" in api.components.requestBodies
diff --git a/tests/fixtures/extra-reduced.yaml b/tests/fixtures/extra-reduced.yaml
index b851d3d0..5b54ab87 100644
--- a/tests/fixtures/extra-reduced.yaml
+++ b/tests/fixtures/extra-reduced.yaml
@@ -85,6 +85,7 @@ paths:
 
   /B:
     get:
+      operationId: B
       responses:
         "200":
           description: "ok"