diff --git a/src/_pytest/deprecated.py b/src/_pytest/deprecated.py
index d5ec5dbbf..69beeab5f 100644
--- a/src/_pytest/deprecated.py
+++ b/src/_pytest/deprecated.py
@@ -10,24 +10,8 @@ in case of warnings which need to format their messages.
 """
 from __future__ import absolute_import, division, print_function
 
-import attr
 
-from _pytest.warning_types import RemovedInPytest4Warning
-
-
-@attr.s
-class UnformattedWarning(object):
-    """Used to hold warnings that need to format their message at runtime, as opposed to a direct message.
-
-    Using this class avoids to keep all the warning types and messages in this module, avoiding misuse.
-    """
-
-    category = attr.ib()
-    template = attr.ib()
-
-    def format(self, **kwargs):
-        """Returns an instance of the warning category, formatted with given kwargs"""
-        return self.category(self.template.format(**kwargs))
+from _pytest.warning_types import UnformattedWarning, RemovedInPytest4Warning
 
 
 MAIN_STR_ARGS = RemovedInPytest4Warning(
diff --git a/src/_pytest/warning_types.py b/src/_pytest/warning_types.py
index 8861f6f2b..55e1f037a 100644
--- a/src/_pytest/warning_types.py
+++ b/src/_pytest/warning_types.py
@@ -1,3 +1,6 @@
+import attr
+
+
 class PytestWarning(UserWarning):
     """
     Bases: :class:`UserWarning`.
@@ -39,4 +42,19 @@ class PytestExperimentalApiWarning(PytestWarning, FutureWarning):
         )
 
 
+@attr.s
+class UnformattedWarning(object):
+    """Used to hold warnings that need to format their message at runtime, as opposed to a direct message.
+
+    Using this class avoids to keep all the warning types and messages in this module, avoiding misuse.
+    """
+
+    category = attr.ib()
+    template = attr.ib()
+
+    def format(self, **kwargs):
+        """Returns an instance of the warning category, formatted with given kwargs"""
+        return self.category(self.template.format(**kwargs))
+
+
 PYTESTER_COPY_EXAMPLE = PytestExperimentalApiWarning.simple("testdir.copy_example")