diff --git a/parser-typechecker/tests/Unison/Test/DataDeclaration.hs b/parser-typechecker/tests/Unison/Test/DataDeclaration.hs
index 9d25c8ffb4..76cddc1760 100644
--- a/parser-typechecker/tests/Unison/Test/DataDeclaration.hs
+++ b/parser-typechecker/tests/Unison/Test/DataDeclaration.hs
@@ -3,9 +3,8 @@
 
 module Unison.Test.DataDeclaration where
 
-import Data.Map (Map, (!))
+import Data.Map ((!))
 import qualified Data.Map as Map
-import Data.Text.Encoding (encodeUtf8)
 import EasyTest
 import Text.RawString.QQ
 import qualified U.Util.Hash as Hash
@@ -21,11 +20,13 @@ import qualified Unison.Type as Type
 import Unison.UnisonFile (UnisonFile (..))
 import qualified Unison.Var as Var
 import qualified Unison.Var.RefNamed as Var
+import Unison.Prelude
+import Data.Bifunctor (second)
 
 test :: Test ()
 test =
   scope "datadeclaration" $
-    let Right hashes = Hashing.hashDataDecls . (snd <$>) . dataDeclarationsId $ file
+    let hashes = fromRight (error "Expected Right") $ Hashing.hashDataDecls . (snd <$>) . dataDeclarationsId $ file
         hashMap = Map.fromList $ fmap (\(a, b, _) -> (a, b)) hashes
         hashOf k = Map.lookup (Var.named k) hashMap
      in tests
@@ -113,7 +114,7 @@ unhashComponentTest =
           component = Map.singleton listRef (Right listDecl)
           component' :: Map R.Id (Symbol, Decl Symbol ())
           component' = DD.unhashComponent component
-          (listVar, Right listDecl') = component' ! listRef
+          (listVar, listDecl') = second (fromRight (error "Expected Right")) $ component' ! listRef
           listType' = var listVar
           constructors = Map.fromList $ DD.constructors listDecl'
           nilType' = constructors ! nil
diff --git a/parser-typechecker/tests/Unison/Test/TermParser.hs b/parser-typechecker/tests/Unison/Test/TermParser.hs
index b09b0b9366..39189b78fd 100644
--- a/parser-typechecker/tests/Unison/Test/TermParser.hs
+++ b/parser-typechecker/tests/Unison/Test/TermParser.hs
@@ -215,7 +215,7 @@ parses = parseWith TP.term
 
 parseWith :: P Symbol a -> String -> Test ()
 parseWith p s = scope (join . take 1 $ lines s) $
-  case Ps.parse @ Symbol p s Common.parsingEnv of
+  case Ps.parse @Symbol p s Common.parsingEnv of
     Left e -> do
       note $ renderParseErrorAsANSI 60 s e
       crash $ renderParseErrorAsANSI 60 s e
diff --git a/parser-typechecker/tests/Unison/Test/Typechecker/TypeError.hs b/parser-typechecker/tests/Unison/Test/Typechecker/TypeError.hs
index ed30079790..5d5cf4da22 100644
--- a/parser-typechecker/tests/Unison/Test/Typechecker/TypeError.hs
+++ b/parser-typechecker/tests/Unison/Test/Typechecker/TypeError.hs
@@ -54,7 +54,9 @@ noYieldsError s ex = not $ yieldsError s ex
 
 yieldsError :: forall a. String -> ErrorExtractor Symbol Ann a -> Bool
 yieldsError s ex =
-  let Result notes (Just _) = Common.parseAndSynthesizeAsFile [] "> test" s
-      notes' :: [C.ErrorNote Symbol Ann]
-      notes' = [n | Result.TypeError n <- toList notes]
-   in any (isJust . Ex.extract ex) notes'
+   case Common.parseAndSynthesizeAsFile [] "> test" s of
+        Result notes (Just _) ->
+          let notes' :: [C.ErrorNote Symbol Ann]
+              notes' = [n | Result.TypeError n <- toList notes]
+           in any (isJust . Ex.extract ex) notes'
+        _ -> error "yieldsError: Failed to parse file"
diff --git a/parser-typechecker/tests/Unison/Test/UnisonSources.hs b/parser-typechecker/tests/Unison/Test/UnisonSources.hs
index d4f62568c2..712076e253 100644
--- a/parser-typechecker/tests/Unison/Test/UnisonSources.hs
+++ b/parser-typechecker/tests/Unison/Test/UnisonSources.hs
@@ -146,7 +146,7 @@ resultTest rt uf filepath = do
       case term of
         Right tm -> do
           -- compare the the watch expression from the .u with the expr in .ur
-          let [watchResult] = view _5 <$> Map.elems watches
+          let watchResult = head (view _5 <$> Map.elems watches)
               tm' = Term.letRec' False bindings watchResult
           -- note . show $ tm'
           -- note . show $ Term.amap (const ()) tm
diff --git a/parser-typechecker/tests/Unison/Test/Util/Bytes.hs b/parser-typechecker/tests/Unison/Test/Util/Bytes.hs
index 101e238840..7049e5718a 100644
--- a/parser-typechecker/tests/Unison/Test/Util/Bytes.hs
+++ b/parser-typechecker/tests/Unison/Test/Util/Bytes.hs
@@ -32,7 +32,7 @@ test =
           b1 <- BS.pack <$> replicateM n word8
           b2 <- BS.pack <$> replicateM m word8
           b3 <- BS.pack <$> replicateM o word8
-          let [b1s, b2s, b3s] = Bytes.fromArray <$> [b1, b2, b3]
+          let (b1s, b2s, b3s) = (Bytes.fromArray b1, Bytes.fromArray b2, Bytes.fromArray b3)
           scope "associtivity" . expect' $
             b1s <> (b2s <> b3s) == (b1s <> b2s) <> b3s
           scope "<>" . expect' $
diff --git a/parser-typechecker/tests/Unison/Test/Util/Text.hs b/parser-typechecker/tests/Unison/Test/Util/Text.hs
index 9285a57ee3..cf34ded45c 100644
--- a/parser-typechecker/tests/Unison/Test/Util/Text.hs
+++ b/parser-typechecker/tests/Unison/Test/Util/Text.hs
@@ -38,7 +38,7 @@ test =
           t1 <- T.pack <$> replicateM n ch
           t2 <- T.pack <$> replicateM m ch
           t3 <- T.pack <$> replicateM o ch
-          let [t1s, t2s, t3s] = Text.fromText <$> [t1, t2, t3]
+          let (t1s, t2s, t3s) = (Text.fromText t1, Text.fromText t2, Text.fromText t3)
           scope "associativity" $ do
             -- note $ show (t1s, t2s, t3s)
             expect' $ t1s <> (t2s <> t3s) == (t1s <> t2s) <> t3s