diff --git a/referencing/_core.py b/referencing/_core.py
index 705fbe1..ec2d51b 100644
--- a/referencing/_core.py
+++ b/referencing/_core.py
@@ -10,7 +10,7 @@
 
 try:
     from typing_extensions import TypeVar
-except ImportError:
+except ImportError:  # pragma: no cover
     from typing import TypeVar
 
 from referencing import exceptions
diff --git a/referencing/retrieval.py b/referencing/retrieval.py
index 4e0b1e8..53e0512 100644
--- a/referencing/retrieval.py
+++ b/referencing/retrieval.py
@@ -10,7 +10,7 @@
 
 try:
     from typing_extensions import TypeVar
-except ImportError:
+except ImportError:  # pragma: no cover
     from typing import TypeVar
 
 from referencing import Resource
diff --git a/referencing/typing.py b/referencing/typing.py
index b58a535..a614464 100644
--- a/referencing/typing.py
+++ b/referencing/typing.py
@@ -9,7 +9,7 @@
 
 try:
     from typing_extensions import TypeVar
-except ImportError:
+except ImportError:  # pragma: no cover
     from typing import TypeVar
 
 if TYPE_CHECKING: