diff --git a/dagger/chunker.nim b/dagger/chunker.nim
index a5ae36af..c1922f10 100644
--- a/dagger/chunker.nim
+++ b/dagger/chunker.nim
@@ -70,7 +70,7 @@ iterator items*(c: Chunker): seq[byte] =
 
     yield chunk
 
-func new(
+func new*(
   T: type Chunker,
   kind = ChunkerType.SizedChunker,
   reader: Reader,
diff --git a/tests/dagger/dataset.nim b/tests/dagger/dataset.nim
deleted file mode 100644
index ab01ef03..00000000
--- a/tests/dagger/dataset.nim
+++ /dev/null
@@ -1,20 +0,0 @@
-import std/sequtils
-
-import pkg/chronos
-import pkg/asynctest
-import pkg/stew/results
-import pkg/dagger/chunker
-import pkg/dagger/merkletree
-import pkg/stew/byteutils
-import pkg/dagger/p2p/rng
-import pkg/dagger/blocktype as bt
-
-suite "Data set":
-
-  test "Make from Blocks":
-    let
-      chunker = newRandomChunker(Rng.instance(), size = 256*3, chunkSize = 256)
-      blocks = chunker.mapIt( bt.Block.new(it) )
-
-    let merkle = MerkleTreeRef.fromBlocks(blocks)
-
diff --git a/tests/dagger/testchunking.nim b/tests/dagger/testchunking.nim
index 82dace73..767a9c4c 100644
--- a/tests/dagger/testchunking.nim
+++ b/tests/dagger/testchunking.nim
@@ -4,7 +4,8 @@ import pkg/dagger/chunker
 
 suite "Chunking":
   test "should return proper size chunks":
-    proc reader(data: var openArray[byte], offset: Natural = 0): int {.gcsafe, closure.} =
+    proc reader(data: var openArray[byte], offset: Natural = 0): int
+      {.gcsafe, closure, raises: [Defect].} =
       let contents = "1234567890".toBytes
       copyMem(addr data[0], unsafeAddr contents[offset], data.len)
       return data.len