diff --git a/mockcat.cabal b/mockcat.cabal
--- a/mockcat.cabal
+++ b/mockcat.cabal
@@ -5,13 +5,19 @@
 -- see: https://github.com/sol/hpack
 
 name:           mockcat
-version:        0.5.0.0
+version:        0.5.1.0
 synopsis:       Mock library for test in Haskell.
-description:    mockcat is a mock library for testing Haskell.
+description:    mockcat is a flexible and powerful mock library.
                 .
-                mockcat provides monad type class generation and stub and verification functions.
+                It provides the following main features.
                 .
-                Stub functions can return values of pure types as well as values of monad types.
+                - Mock generation of monadic typeclasses
+                .
+                - Generation of stub functions independent of typeclasses
+                .
+                - Verification of stub functions
+                .
+                Stub functions can return not only values of monadic types, but also pure types.
                 .
                 For more please see the README on GitHub at <https://github.com/pujoheadsoft/mockcat#readme>
 category:       Testing
diff --git a/test/Test/MockCat/ExampleSpec.hs b/test/Test/MockCat/ExampleSpec.hs
--- a/test/Test/MockCat/ExampleSpec.hs
+++ b/test/Test/MockCat/ExampleSpec.hs
@@ -63,6 +63,12 @@
   it "echo3" do
     result <- runMockT do
       _readTTY $ casesIO ["a", ""]
+      _writeTTY $ "a" |> pure @IO ()
+      echo
+    result `shouldBe` ()
+
+  it "echo4" do
+    result <- runMockT do
       _readTTY $ cases [ pure @IO "a", pure @IO "" ]
       _writeTTY $ "a" |> pure @IO ()
       echo