diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0bac03d..b8df42d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,6 +14,7 @@ Bugfixes:
 Other improvements:
 - Changed default branch to `main` from `master`
 - Updated to comply with Contributors library guidelines by adding new issue and pull request templates, updating documentation, and migrating to Spago for local development and CI
+- Replaced `test-unit` dependency with `assert` and `ReaderT` wrapper (#11)
 
 ## [v1.1.0](https://github.com/purescript-contrib/purescript-concurrent-queues/releases/tag/v1.1.0) - 2018-10-22
 
diff --git a/spago.dhall b/spago.dhall
index 299e7f5..f07a003 100644
--- a/spago.dhall
+++ b/spago.dhall
@@ -1,6 +1,6 @@
 { name = "concurrent-queues"
 , dependencies =
-  [ "aff", "avar", "console", "effect", "psci-support", "test-unit" ]
+  [ "aff", "assert", "avar", "console", "effect", "psci-support" ]
 , packages = ./packages.dhall
 , sources = [ "src/**/*.purs", "test/**/*.purs" ]
 }
diff --git a/test/BoundedQueue.purs b/test/BoundedQueue.purs
index 6c7b906..0e93395 100644
--- a/test/BoundedQueue.purs
+++ b/test/BoundedQueue.purs
@@ -5,14 +5,15 @@ import Prelude
 import Concurrent.BoundedQueue as BQ
 import Concurrent.BoundedQueue.Sync as BQS
 import Control.Alt ((<|>))
+import Control.Monad.Reader.Class (class MonadReader)
 import Data.Either (Either(..), isLeft, isRight)
 import Data.Int (toNumber)
 import Data.Maybe (Maybe(..), isNothing)
 import Data.Tuple (Tuple(..))
 import Effect.Aff (Aff, Milliseconds(..), delay, forkAff, parallel, sequential)
 import Effect.Class (liftEffect)
-import Test.Unit (TestSuite, suite, test)
-import Test.Unit.Assert as Assert
+import Effect.Aff.Class (class MonadAff, liftAff)
+import Test.Util (suite, test, shouldEqual, assert, assertFalse)
 
 race ∷ ∀ a b. Aff a → Aff b → Aff (Either a b)
 race a b = sequential ((parallel (map Left a)) <|> (parallel (map Right b)))
@@ -20,79 +21,79 @@ race a b = sequential ((parallel (map Left a)) <|> (parallel (map Right b)))
 delayMs ∷ Int → Aff Unit
 delayMs = delay <<< Milliseconds <<< toNumber
 
-boundedQueueSuite ∷ TestSuite
+boundedQueueSuite ∷ forall m. MonadReader Int m ⇒ MonadAff m ⇒ m Unit
 boundedQueueSuite = do
   suite "Simple operations" do
-    test "inserting and popping elements" do
+    test "inserting and popping elements" $ liftAff do
       q ← BQ.new 2
       BQ.write q 1
       BQ.write q 2
       r1 ← BQ.read q
       r2 ← BQ.read q
-      Assert.equal r1 1
-      Assert.equal r2 2
+      r1 `shouldEqual` 1
+      r2 `shouldEqual` 2
   suite "Blocking and unblocking" do
-    test "writing more than the allowed capacity blocks" do
+    test "writing more than the allowed capacity blocks" $ liftAff do
       q ← BQ.new 1
       BQ.write q 1
       r ← race (delayMs 50) (BQ.write q 2)
-      Assert.assert "Not blocked" (isLeft r)
-    test "reading unblocks writes blocked on missing capacity" do
+      assert "Not blocked" (isLeft r)
+    test "reading unblocks writes blocked on missing capacity" $ liftAff do
       q ← BQ.new 1
       BQ.write q 1
       _ ← forkAff (delayMs 20 *> (BQ.read q))
       r ← race (delayMs 50) (BQ.write q 2)
-      Assert.assert "Blocked too long" (isRight r)
+      assert "Blocked too long" (isRight r)
   suite "isEmpty" do
-    test "an empty queue is empty" do
+    test "an empty queue is empty" $ liftAff do
       q ← BQ.new 1
       r ← BQ.isEmpty q
-      Assert.assert "" r
-    test "an empty queue with blocked readers is empty" do
+      assert "" r
+    test "an empty queue with blocked readers is empty" $ liftAff do
       q ← BQ.new 1
       _ ← forkAff (BQ.read q)
       r ← BQ.isEmpty q
-      Assert.assert "" r
+      assert "" r
   suite "tryRead blocking and unblocking" do
-    test "tryRead is non-blocking for empty queue" do
+    test "tryRead is non-blocking for empty queue" $ liftAff do
       q ← BQ.new 1
       r ← BQ.tryRead q
-      Assert.assert "Should've been Nothing" (isNothing r)
-    test "tryRead reads from a non-empty queue" do
+      assert "Should've been Nothing" (isNothing r)
+    test "tryRead reads from a non-empty queue" $ liftAff do
       q ← BQ.new 1
       BQ.write q 1
       r1 ← BQ.tryRead q
       r2 ← BQ.tryRead q
-      Assert.equal r1 (Just 1)
-      Assert.assert "Should've been Nothing" (isNothing r2)
-    test "tryRead blocks when there are consumers blocked on the queue" do
+      r1 `shouldEqual` (Just 1)
+      assert "Should've been Nothing" (isNothing r2)
+    test "tryRead blocks when there are consumers blocked on the queue" $ liftAff do
       q ← BQ.new 1
       _ ← forkAff (BQ.read q)
       r ← race (delayMs 20) (BQ.tryRead q)
-      Assert.assert "Should've been Left" (isLeft r)
+      assert "Should've been Left" (isLeft r)
   suite "tryWrite blocking and unblocking" do
-    test "tryWrite is non-blocking for full queue" do
+    test "tryWrite is non-blocking for full queue" $ liftAff do
       q ← BQ.new 1
       BQ.write q 1
       r ← BQ.tryWrite q 2
-      Assert.assertFalse "Write should've failed" r
-    test "tryWrite writes to a non-full queue" do
+      assertFalse "Write should've failed" r
+    test "tryWrite writes to a non-full queue" $ liftAff do
       q ← BQ.new 1
       rw ← BQ.tryWrite q 1
       r ← BQ.read q
-      Assert.assert "tryWrite should've succeeded" rw
-      Assert.equal r 1
-    test "tryWrite blocks when there are writers blocked on the queue" do
+      assert "tryWrite should've succeeded" rw
+      r `shouldEqual` 1
+    test "tryWrite blocks when there are writers blocked on the queue" $ liftAff do
       q ← BQ.new 1
       BQ.write q 1
       _ ← forkAff (BQ.write q 2)
       r ← race (delayMs 20) (BQ.tryWrite q 2)
-      Assert.assert "Should've been Left" (isLeft r)
+      assert "Should've been Left" (isLeft r)
 
-boundedQueueSyncSuite :: TestSuite
+boundedQueueSyncSuite :: forall m. MonadReader Int m ⇒ MonadAff m ⇒ m Unit
 boundedQueueSyncSuite = do
   suite "(Sync) Simple operations" do
-    test "(Sync) inserting and popping elements" do
+    test "(Sync) inserting and popping elements" $ liftAff do
       Tuple r1 r2 ← liftEffect do
         q ← liftEffect (BQS.new 2)
         _ ← BQS.tryWrite q 1
@@ -100,70 +101,70 @@ boundedQueueSyncSuite = do
         r1 ← BQS.tryRead q
         r2 ← BQS.tryRead q
         pure (Tuple r1 r2)
-      Assert.equal r1 (Just 1)
-      Assert.equal r2 (Just 2)
+      r1 `shouldEqual` (Just 1)
+      r2 `shouldEqual` (Just 2)
   suite "(Sync) Blocking and unblocking" do
-    test "(Sync) writing more than the allowed capacity blocks" do
+    test "(Sync) writing more than the allowed capacity blocks" $ liftAff do
       q ← liftEffect (BQS.new 1)
       BQ.write q 1
       r ← race (delayMs 50) (BQ.write q 2)
-      Assert.assert "Not blocked" (isLeft r)
-    test "(Sync) reading unblocks writes blocked on missing capacity" do
+      assert "Not blocked" (isLeft r)
+    test "(Sync) reading unblocks writes blocked on missing capacity" $ liftAff do
       q ← liftEffect (BQS.new 1)
       BQ.write q 1
       _ ← forkAff (delayMs 20 *> (BQ.read q))
       r ← race (delayMs 50) (BQ.write q 2)
-      Assert.assert "Blocked too long" (isRight r)
+      assert "Blocked too long" (isRight r)
   suite "(Sync) isEmpty" do
-    test "(Sync) an empty queue is empty" do
+    test "(Sync) an empty queue is empty" $ liftAff do
       r ← liftEffect do
         q ← BQS.new 1
         BQS.isEmpty q
-      Assert.assert "" r
-    test "(Sync) an empty queue with blocked readers is empty" do
+      assert "" r
+    test "(Sync) an empty queue with blocked readers is empty" $ liftAff do
       q ← liftEffect (BQS.new 1)
       _ ← forkAff (BQ.read q)
       r ← liftEffect (BQS.isEmpty q)
-      Assert.assert "" r
+      assert "" r
   suite "(Sync) tryRead blocking and unblocking" do
-    test "(Sync) tryRead is non-blocking for empty queue" do
+    test "(Sync) tryRead is non-blocking for empty queue" $ liftAff do
       r ← liftEffect do
         q ← BQS.new 1
         BQS.tryRead q
-      Assert.assert "Should've been Nothing" (isNothing r)
-    test "(Sync) tryRead reads from a non-empty queue" do
+      assert "Should've been Nothing" (isNothing r)
+    test "(Sync) tryRead reads from a non-empty queue" $ liftAff do
       q ← liftEffect (BQS.new 1)
       BQ.write q 1
       Tuple r1 r2 ← liftEffect do
         r1 ← BQS.tryRead q
         r2 ← BQS.tryRead q
         pure (Tuple r1 r2)
-      Assert.equal r1 (Just 1)
-      Assert.assert "Should've been Nothing" (isNothing r2)
+      r1 `shouldEqual` (Just 1)
+      assert "Should've been Nothing" (isNothing r2)
     test ("(Sync) tryRead does not block when there are consumers blocked on "
-      <> "the queue") do
+      <> "the queue") $ liftAff do
       q ← liftEffect (BQS.new 1)
       _ ← forkAff (BQ.read q)
       r ← race (delayMs 20) (liftEffect (BQS.tryRead q))
-      Assert.assert "Should've been Right" (isRight r)
+      assert "Should've been Right" (isRight r)
   suite "(Sync) tryWrite blocking and unblocking" do
-    test "(Sync) tryWrite is non-blocking for full queue" do
+    test "(Sync) tryWrite is non-blocking for full queue" $ liftAff do
       q ← liftEffect (BQS.new 1)
       BQ.write q 1
       r ← liftEffect (BQS.tryWrite q 2)
-      Assert.assertFalse "Write should've failed" r
-    test "(Sync) tryWrite writes to a non-full queue" do
+      assertFalse "Write should've failed" r
+    test "(Sync) tryWrite writes to a non-full queue" $ liftAff do
       Tuple q rw ← liftEffect do
         q ← BQS.new 1
         rw ← BQS.tryWrite q 1
         pure (Tuple q rw)
       r ← BQ.read q
-      Assert.assert "tryWrite should've succeeded" rw
-      Assert.equal r 1
+      assert "tryWrite should've succeeded" rw
+      r `shouldEqual` 1
     test ("(Sync) tryWrite does not block when there are writers blocked on " <>
-      "the queue") do
+      "the queue") $ liftAff do
       q ← liftEffect (BQS.new 1)
       BQ.write q 1
       _ ← forkAff (BQ.write q 2)
       r ← race (delayMs 20) (liftEffect (BQS.tryWrite q 2))
-      Assert.assert "Should've been Right" (isRight r)
+      assert "Should've been Right" (isRight r)
diff --git a/test/Main.purs b/test/Main.purs
index 6387da8..49f2dac 100644
--- a/test/Main.purs
+++ b/test/Main.purs
@@ -2,14 +2,15 @@ module Test.Main where
 
 import Prelude
 
+import Control.Monad.Reader.Trans (runReaderT)
 import Effect (Effect)
+import Effect.Aff (launchAff_)
 import Test.BoundedQueue (boundedQueueSuite, boundedQueueSyncSuite)
 import Test.Queue (queueSuite)
-import Test.Unit (suite)
-import Test.Unit.Main (runTest)
+import Test.Util (suite)
 
 main ∷ Effect Unit
-main = runTest do
+main = launchAff_ $ flip runReaderT 0 do
   suite "Queue" queueSuite
   suite "BoundedQueue" boundedQueueSuite
   suite "(Sync) BoundedQueue" boundedQueueSyncSuite
diff --git a/test/Queue.purs b/test/Queue.purs
index e5b8cd0..69c7707 100644
--- a/test/Queue.purs
+++ b/test/Queue.purs
@@ -4,12 +4,13 @@ import Prelude
 
 import Concurrent.Queue as Q
 import Control.Alt ((<|>))
+import Control.Monad.Reader.Class (class MonadReader)
 import Data.Either (Either(..), isLeft, isRight)
 import Data.Int (toNumber)
 import Data.Maybe (Maybe(..), isNothing)
 import Effect.Aff (Aff, Milliseconds(..), delay, forkAff, parallel, sequential)
-import Test.Unit (TestSuite, suite, test)
-import Test.Unit.Assert as Assert
+import Effect.Aff.Class (class MonadAff, liftAff)
+import Test.Util (suite, test, shouldEqual, assert)
 
 race ∷ ∀ a b. Aff a → Aff b → Aff (Either a b)
 race a b = sequential ((parallel (map Left a)) <|> (parallel (map Right b)))
@@ -17,10 +18,10 @@ race a b = sequential ((parallel (map Left a)) <|> (parallel (map Right b)))
 delayMs ∷ Int → Aff Unit
 delayMs = delay <<< Milliseconds <<< toNumber
 
-queueSuite ∷ TestSuite
+queueSuite ∷ forall m. MonadReader Int m ⇒ MonadAff m ⇒ m Unit
 queueSuite = do
   suite "Simple operations" do
-    test "inserting and popping elements" do
+    test "inserting and popping elements" $ liftAff do
       q ← Q.new
       Q.write q 1
       Q.write q 2
@@ -28,33 +29,33 @@ queueSuite = do
       r2 ← Q.read q
       Q.write q 3
       r3 ← Q.read q
-      Assert.equal r1 1
-      Assert.equal r2 2
-      Assert.equal r3 3
+      r1 `shouldEqual` 1
+      r2 `shouldEqual` 2
+      r3 `shouldEqual` 3
   suite "Blocking and unblocking" do
-    test "reading from an empty Queue blocks" do
+    test "reading from an empty Queue blocks" $ liftAff do
       q ← Q.new
       r ← race (delayMs 50) (Q.read q)
-      Assert.assert "Not blocked" (isLeft r)
-    test "writing unblocks reads" do
+      assert "Not blocked" (isLeft r)
+    test "writing unblocks reads" $ liftAff do
       q ← Q.new
       _ ← forkAff (delayMs 20 *> (Q.write q 1))
       r ← race (delayMs 50) (Q.read q)
-      Assert.assert "Blocked too long" (isRight r)
+      assert "Blocked too long" (isRight r)
   suite "tryRead blocking and unblocking" do
-    test "tryRead is non-blocking for empty queue" do
+    test "tryRead is non-blocking for empty queue" $ liftAff do
       q ← Q.new
       r ← Q.tryRead q
-      Assert.assert "Should've been Nothing" (isNothing r)
-    test "tryRead reads from a non-empty queue" do
+      assert "Should've been Nothing" (isNothing r)
+    test "tryRead reads from a non-empty queue" $ liftAff do
       q ← Q.new
       Q.write q 1
       r1 ← Q.tryRead q
       r2 ← Q.tryRead q
-      Assert.equal r1 (Just 1)
-      Assert.assert "Should've been Nothing" (isNothing r2)
-    test "tryRead blocks when there are consumers blocked on the queue" do
+      r1 `shouldEqual` (Just 1)
+      assert "Should've been Nothing" (isNothing r2)
+    test "tryRead blocks when there are consumers blocked on the queue" $ liftAff do
       q ← Q.new
       _ ← forkAff (Q.read q)
       r ← race (delayMs 20) (Q.tryRead q)
-      Assert.assert "Should've been Left" (isLeft r)
+      assert "Should've been Left" (isLeft r)
diff --git a/test/Util.purs b/test/Util.purs
new file mode 100644
index 0000000..3fb1b99
--- /dev/null
+++ b/test/Util.purs
@@ -0,0 +1,38 @@
+module Test.Util where
+
+import Prelude
+
+import Control.Monad.Reader.Class (class MonadReader, ask, local)
+import Data.Monoid (power, guard)
+import Effect.Console (log)
+import Effect.Class (liftEffect)
+import Effect.Class.Console (error)
+import Effect.Aff.Class (class MonadAff, liftAff)
+import Test.Assert (assertEqual)
+
+-----------------------------------------------------------------
+
+-- Provide similar API to purescript-test-unit to reduce code changes
+
+suite :: forall m. MonadReader Int m ⇒ MonadAff m ⇒ String -> m Unit -> m Unit
+suite = test
+
+test :: forall m. MonadReader Int m ⇒ MonadAff m ⇒ String -> m Unit -> m Unit
+test msg runTest = do
+  indentation <- ask
+  let spacing = guard (indentation > 0) " "
+  liftEffect $ log $ (power ">>" indentation) <> spacing <> msg
+  local (_ + 1) runTest
+
+shouldEqual :: forall m a. MonadAff m ⇒ Eq a ⇒ Show a ⇒ a -> a -> m Unit
+shouldEqual actual expected =
+  liftEffect $ assertEqual { actual, expected }
+
+assert :: forall m. MonadAff m => String -> Boolean -> m Unit
+assert _ true = pure unit
+assert msg false = liftAff $ error msg
+
+assertFalse :: forall m. MonadAff m => String -> Boolean -> m Unit
+assertFalse msg b = assert msg (not b)
+
+-----------------------------------------------------------------