diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+#### 0.3.11.1
+
+* Add missing file to dist of test-suite (thanks to Sergei Trofimovich)
+
 #### 0.3.11.0
 
 * Add `toFeedDateStringUTC` which uses UTCTime rather than ClockTime (thanks to Emanuel Borsboom)
diff --git a/feed.cabal b/feed.cabal
--- a/feed.cabal
+++ b/feed.cabal
@@ -1,5 +1,5 @@
 name:                feed
-version:             0.3.11.0
+version:             0.3.11.1
 license:             BSD3
 license-file:        LICENSE
 category:            Text
@@ -74,6 +74,7 @@
   type:              exitcode-stdio-1.0
   other-modules:
     Text.Atom.Tests
+    Text.Feed.Util.Tests
     Text.RSS.Equals
     Text.RSS.Export.Tests
     Text.RSS.Import.Tests
diff --git a/tests/Text/Feed/Util/Tests.hs b/tests/Text/Feed/Util/Tests.hs
new file mode 100644
--- /dev/null
+++ b/tests/Text/Feed/Util/Tests.hs
@@ -0,0 +1,30 @@
+module Text.Feed.Util.Tests where
+
+import Data.Time
+import Data.Time.Clock.POSIX
+import Test.Framework (Test, testGroup)
+import Test.HUnit (Assertion, assertEqual)
+import Test.Framework.Providers.HUnit (testCase)
+import Text.Feed.Types
+import Text.Feed.Util
+import System.Time
+
+feedUtilTests :: Test
+feedUtilTests = testGroup "Text.Feed.Util"
+    [ testGroup "toFeedDateString[UTC]"
+        [ testToFeedDateString AtomKind (read "2016-01-07 15:33:29 UTC") "2016-01-07T15:33:29Z"
+        , testToFeedDateString (RSSKind Nothing) (read "2016-01-07 15:33:29 UTC") "Thu, 07 Jan 2016 15:33:29 GMT"
+        , testToFeedDateString (RDFKind Nothing) (read "2016-01-07 15:33:29 UTC") "2016-01-07T15:33:29Z"
+        ]
+    ]
+
+testToFeedDateString :: FeedKind -> UTCTime -> String -> Test
+testToFeedDateString kind utct expectResult =
+    testCase (show kind) testToDateString
+  where
+    testToDateString :: Assertion
+    testToDateString = do
+      assertEqual "toFeedDateStringUTC" expectResult (toFeedDateStringUTC kind utct)
+      assertEqual "toFeedDateString" expectResult (toFeedDateString kind clockTime)
+    clockTime =
+      TOD (truncate $ utcTimeToPOSIXSeconds utct) 0