diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,5 +1,9 @@
 # ChangeLog for streaming-commons
 
+## 0.2.2.5
+
+* UTF-8 Decoder fails on trailing bytes [#71](https://github.com/fpco/streaming-commons/pull/71)
+
 ## 0.2.2.4
 
 * Fix docstrings for text 2.0
diff --git a/Data/Streaming/Text.hs b/Data/Streaming/Text.hs
--- a/Data/Streaming/Text.hs
+++ b/Data/Streaming/Text.hs
@@ -126,7 +126,11 @@
       -- Caught exception does not allow to reconstruct 'DecodeResultFailure',
       -- so delegating this to 'decodeUtf8Pure'
       Left (_ :: TE.UnicodeException) -> decodeUtf8Pure (prev <> curr)
-      Right (TE.Some decoded undecoded cont) -> DecodeResultSuccess decoded (go undecoded cont)
+      Right (TE.Some decoded undecoded cont)
+          -- An empty bytestring indicates end-of-input, if we still have undecoded bytes that
+          -- becomes a failure.
+          | B.null curr && not (B.null undecoded) -> DecodeResultFailure decoded undecoded
+          | otherwise -> DecodeResultSuccess decoded (go undecoded cont)
 #else
 decodeUtf8 = decodeChunk B.empty 0 0
  where
diff --git a/streaming-commons.cabal b/streaming-commons.cabal
--- a/streaming-commons.cabal
+++ b/streaming-commons.cabal
@@ -1,5 +1,5 @@
 name:                streaming-commons
-version:             0.2.2.4
+version:             0.2.2.5
 synopsis:            Common lower-level functions needed by various streaming data libraries
 description:         Provides low-dependency functionality commonly needed by various streaming data libraries, such as conduit and pipes.
 homepage:            https://github.com/fpco/streaming-commons
@@ -94,6 +94,8 @@
                   , network >= 2.4.0.0
                   , text
                   , zlib
+    build-tool-depends:
+        hspec-discover:hspec-discover
 
   if flag(use-bytestring-builder)
     build-depends:     bytestring < 0.10.2.0