diff --git a/NEWS b/NEWS
index e10cf276..20defc5b 100644
--- a/NEWS
+++ b/NEWS
@@ -3,6 +3,17 @@ testtools NEWS
 
 Changes and improvements to testtools_, grouped by release.
 
+NEXT
+~~~~
+
+Improvements
+------------
+
+* Make ``extract_result()`` and ``DeferredNotFired`` public APIs in
+  ``testtools.twistedsupport``. These utilities are useful for extracting
+  results from synchronous Deferreds in tests.
+  (Jelmer Vernooij, #546)
+
 2.8.3
 ~~~~~
 
diff --git a/doc/twisted-support.rst b/doc/twisted-support.rst
index 62435929..f90cbbd9 100644
--- a/doc/twisted-support.rst
+++ b/doc/twisted-support.rst
@@ -38,6 +38,20 @@ See also `Testing Deferreds without the reactor`_ and the `Deferred howto`_.
    :noindex:
 
 
+Extracting results from Deferreds
+----------------------------------
+
+When testing code that returns synchronous
+:py:class:`~twisted.internet.defer.Deferred`\s for compatibility reasons, you
+may want to extract the result directly instead of using matchers.
+
+.. autofunction:: testtools.twistedsupport.extract_result
+   :noindex:
+
+.. autoexception:: testtools.twistedsupport.DeferredNotFired
+   :noindex:
+
+
 Running tests in the reactor
 ----------------------------
 
diff --git a/testtools/twistedsupport/__init__.py b/testtools/twistedsupport/__init__.py
index 42cae985..96d8f423 100644
--- a/testtools/twistedsupport/__init__.py
+++ b/testtools/twistedsupport/__init__.py
@@ -7,8 +7,11 @@
     "AsynchronousDeferredRunTest",
     "AsynchronousDeferredRunTestForBrokenTwisted",
     "CaptureTwistedLogs",
+    # Deferred utilities
+    "DeferredNotFired",
     "SynchronousDeferredRunTest",
     "assert_fails_with",
+    "extract_result",
     "failed",
     "flush_logged_errors",
     "has_no_result",
@@ -16,6 +19,10 @@
     "succeeded",
 ]
 
+from ._deferred import (
+    DeferredNotFired,
+    extract_result,
+)
 from ._matchers import (
     failed,
     has_no_result,