diff --git a/tests/dagger/blockexc/discovery/mockdiscovery.nim b/tests/dagger/blockexc/discovery/mockdiscovery.nim
new file mode 100644
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+++ b/tests/dagger/blockexc/discovery/mockdiscovery.nim
@@ -0,0 +1,54 @@
+## Nim-Dagger
+## Copyright (c) 2022 Status Research & Development GmbH
+## Licensed under either of
+##  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
+##  * MIT license ([LICENSE-MIT](LICENSE-MIT))
+## at your option.
+## This file may not be copied, modified, or distributed except according to
+## those terms.
+
+import pkg/chronos
+import pkg/libp2p
+import pkg/questionable
+import pkg/questionable/results
+import pkg/stew/shims/net
+import pkg/libp2pdht/discv5/protocol as discv5
+
+export discv5
+
+type
+  MockDiscovery* = ref object of Discovery
+    findBlockProvidersHandler*: proc(d: MockDiscovery, cid: Cid): seq[SignedPeerRecord] {.gcsafe.}
+    publishProvideHandler*: proc(d: MockDiscovery, cid: Cid) {.gcsafe.}
+
+proc new*(
+  T: type Discovery,
+  localInfo: PeerInfo,
+  discoveryPort: Port,
+  bootstrapNodes = newSeq[SignedPeerRecord](),
+  ): T =
+
+  T()
+
+proc findPeer*(
+  d: Discovery,
+  peerId: PeerID): Future[?PeerRecord] {.async.} =
+  return none(PeerRecord)
+
+proc findBlockProviders*(
+  d: Discovery,
+  cid: Cid): Future[seq[SignedPeerRecord]] {.async.} =
+  if isNil(d.findBlockProvidersHandler): return
+
+  return d.findBlockProvidersHandler(d, cid)
+
+method provideBlock*(d: MockDiscovery, cid: Cid) {.async.} =
+  if isNil(d.publishProvideHandler): return
+  d.publishProvideHandler(d, cid)
+
+
+proc start*(d: Discovery) {.async.} =
+  discard
+
+proc stop*(d: Discovery) {.async.} =
+  discard