diff --git a/.github/workflows/dist.yml b/.github/workflows/dist.yml
index cb12809..68bdd86 100644
--- a/.github/workflows/dist.yml
+++ b/.github/workflows/dist.yml
@@ -39,7 +39,7 @@ jobs:
     strategy:
       matrix:
         os: [windows-latest, macos-latest, ubuntu-18.04]
-        python_version: [3.6, 3.7, 3.8, 3.9]
+        python_version: [3.6, 3.7, 3.8, 3.9, "3.10"]
         architecture: [x86, x64]
         exclude:
         - os: macos-latest
diff --git a/tests/test_class.py b/tests/test_class.py
index f71f6e1..a932589 100644
--- a/tests/test_class.py
+++ b/tests/test_class.py
@@ -2958,3 +2958,43 @@ def test_class_volatile():
             ]
         )
     )
+
+
+def test_class_mutable():
+    content = """
+      class Foo
+      {
+      private:
+      
+      mutable volatile Standard_Integer myRefCount_;
+      
+      };
+    """
+    data = parse_string(content, cleandoc=True)
+
+    assert data == ParsedData(
+        namespace=NamespaceScope(
+            classes=[
+                ClassScope(
+                    class_decl=ClassDecl(
+                        typename=PQName(
+                            segments=[NameSpecifier(name="Foo")], classkey="class"
+                        )
+                    ),
+                    fields=[
+                        Field(
+                            access="private",
+                            type=Type(
+                                typename=PQName(
+                                    segments=[NameSpecifier(name="Standard_Integer")]
+                                ),
+                                volatile=True,
+                            ),
+                            name="myRefCount_",
+                            mutable=True,
+                        )
+                    ],
+                )
+            ]
+        )
+    )
diff --git a/tests/test_fn.py b/tests/test_fn.py
index 9b571be..c8d974a 100644
--- a/tests/test_fn.py
+++ b/tests/test_fn.py
@@ -821,3 +821,39 @@ def test_fn_trailing_return_std_function():
             ]
         )
     )
+
+
+def test_inline_volatile_fn():
+    content = """
+      inline int Standard_Atomic_Increment (volatile int* theValue);
+    """
+    data = parse_string(content, cleandoc=True)
+
+    assert data == ParsedData(
+        namespace=NamespaceScope(
+            functions=[
+                Function(
+                    return_type=Type(
+                        typename=PQName(segments=[FundamentalSpecifier(name="int")])
+                    ),
+                    name=PQName(
+                        segments=[NameSpecifier(name="Standard_Atomic_Increment")]
+                    ),
+                    parameters=[
+                        Parameter(
+                            type=Pointer(
+                                ptr_to=Type(
+                                    typename=PQName(
+                                        segments=[FundamentalSpecifier(name="int")]
+                                    ),
+                                    volatile=True,
+                                )
+                            ),
+                            name="theValue",
+                        )
+                    ],
+                    inline=True,
+                )
+            ]
+        )
+    )