diff --git a/refurb/checks/common.py b/refurb/checks/common.py
index c39b908..823fd9e 100644
--- a/refurb/checks/common.py
+++ b/refurb/checks/common.py
@@ -732,6 +732,7 @@ def mypy_type_to_python_type(ty: Type | SymbolNode | None) -> type | None:
     "collections.abc.Mapping",
     "collections.abc.MutableMapping",
     "collections.defaultdict",
+    "os._Environ",
     "typing.Mapping",
     "typing.MutableMapping",
 )
diff --git a/refurb/checks/readability/no_copy_with_merge.py b/refurb/checks/readability/no_copy_with_merge.py
index c8a4f58..a69e13e 100644
--- a/refurb/checks/readability/no_copy_with_merge.py
+++ b/refurb/checks/readability/no_copy_with_merge.py
@@ -45,7 +45,7 @@ def check_expr(expr: Expression, errors: list[Error]) -> None:
         case CallExpr(
             callee=MemberExpr(expr=lhs, name="copy"),
             args=[],
-        ) if is_same_type(get_mypy_type(lhs), dict, set):
+        ) if is_same_type(get_mypy_type(lhs), dict, set, "os._Environ"):
             msg = f"Replace `{stringify(lhs)}.copy()` with `{stringify(lhs)}`"
 
             errors.append(ErrorInfo.from_node(expr, msg))
diff --git a/test/data/err_173.py b/test/data/err_173.py
index 24d9143..7264a92 100644
--- a/test/data/err_173.py
+++ b/test/data/err_173.py
@@ -57,6 +57,11 @@ def mutable_mapping_test(m: MutableMapping[str, str]):
     _ = dict(**m)
 
 
+import os
+
+_ = dict(**os.environ)
+
+
 # these should not
 
 _ = {}
diff --git a/test/data/err_173.txt b/test/data/err_173.txt
index 8eb0e9b..0808811 100644
--- a/test/data/err_173.txt
+++ b/test/data/err_173.txt
@@ -24,3 +24,4 @@ test/data/err_173.py:43:5 [FURB173]: Replace `dict(**x, **{})` with `x | {}`
 test/data/err_173.py:48:5 [FURB173]: Replace `{**Wrapper().d, **x}` with `Wrapper().d | x`
 test/data/err_173.py:54:9 [FURB173]: Replace `dict(**m)` with `{**m}`
 test/data/err_173.py:57:9 [FURB173]: Replace `dict(**m)` with `{**m}`
+test/data/err_173.py:62:5 [FURB173]: Replace `dict(**os.environ)` with `{**os.environ}`
diff --git a/test/data/err_185.py b/test/data/err_185.py
index 5e3cf06..409b358 100644
--- a/test/data/err_185.py
+++ b/test/data/err_185.py
@@ -17,6 +17,10 @@ class C:
 
 _ = C().d.copy() | {}
 
+import os
+
+_ = os.environ.copy() | {}
+
 
 # these should not
 
diff --git a/test/data/err_185.txt b/test/data/err_185.txt
index 5337438..3d160a7 100644
--- a/test/data/err_185.txt
+++ b/test/data/err_185.txt
@@ -5,3 +5,4 @@ test/data/err_185.py:9:13 [FURB185]: Replace `y.copy()` with `y`
 test/data/err_185.py:11:5 [FURB185]: Replace `x.copy()` with `x`
 test/data/err_185.py:11:21 [FURB185]: Replace `x.copy()` with `x`
 test/data/err_185.py:18:5 [FURB185]: Replace `C().d.copy()` with `C().d`
+test/data/err_185.py:22:5 [FURB185]: Replace `os.environ.copy()` with `os.environ`