diff --git a/collect/collect_test.go b/collect/collect_test.go
index 80a39dde20..f19df065d6 100644
--- a/collect/collect_test.go
+++ b/collect/collect_test.go
@@ -18,6 +18,7 @@ import (
 	"github.com/honeycombio/refinery/logger"
 	"github.com/honeycombio/refinery/metrics"
 	"github.com/honeycombio/refinery/sample"
+	"github.com/honeycombio/refinery/sharder"
 	"github.com/honeycombio/refinery/transmit"
 	"github.com/honeycombio/refinery/types"
 )
@@ -792,6 +793,7 @@ func TestDependencyInjection(t *testing.T) {
 		&inject.Object{Value: &sample.SamplerFactory{}},
 		&inject.Object{Value: &MockStressReliever{}, Name: "stressRelief"},
 		&inject.Object{Value: &peer.MockPeers{}},
+		&inject.Object{Value: &sharder.TestSharder{}},
 	)
 	if err != nil {
 		t.Error(err)
diff --git a/route/route_test.go b/route/route_test.go
index bed5149da7..02d3c2612b 100644
--- a/route/route_test.go
+++ b/route/route_test.go
@@ -313,7 +313,7 @@ func TestDebugTrace(t *testing.T) {
 
 	rr := httptest.NewRecorder()
 	router := &Router{
-		Sharder: &TestSharder{},
+		Sharder: &sharder.TestSharder{},
 	}
 
 	router.debugTrace(rr, req)
@@ -425,7 +425,7 @@ func TestDependencyInjection(t *testing.T) {
 		&inject.Object{Value: http.DefaultTransport, Name: "upstreamTransport"},
 		&inject.Object{Value: &transmit.MockTransmission{}, Name: "upstreamTransmission"},
 		&inject.Object{Value: &transmit.MockTransmission{}, Name: "peerTransmission"},
-		&inject.Object{Value: &TestSharder{}},
+		&inject.Object{Value: &sharder.TestSharder{}},
 		&inject.Object{Value: &collect.InMemCollector{}},
 		&inject.Object{Value: &metrics.NullMetrics{}, Name: "metrics"},
 		&inject.Object{Value: &metrics.NullMetrics{}, Name: "genericMetrics"},
@@ -440,23 +440,6 @@ func TestDependencyInjection(t *testing.T) {
 	}
 }
 
-type TestSharder struct{}
-
-func (s *TestSharder) MyShard() sharder.Shard { return nil }
-
-func (s *TestSharder) WhichShard(string) sharder.Shard {
-	return &TestShard{
-		addr: "http://localhost:12345",
-	}
-}
-
-type TestShard struct {
-	addr string
-}
-
-func (s *TestShard) Equals(other sharder.Shard) bool { return true }
-func (s *TestShard) GetAddress() string              { return s.addr }
-
 func TestEnvironmentCache(t *testing.T) {
 	t.Run("calls getFn on cache miss", func(t *testing.T) {
 		cache := newEnvironmentCache(time.Second, func(key string) (string, error) {
diff --git a/sharder/mock.go b/sharder/mock.go
new file mode 100644
index 0000000000..81963cc5a0
--- /dev/null
+++ b/sharder/mock.go
@@ -0,0 +1,18 @@
+package sharder
+
+type TestSharder struct{}
+
+func (s *TestSharder) MyShard() Shard { return nil }
+
+func (s *TestSharder) WhichShard(string) Shard {
+	return &TestShard{
+		addr: "http://localhost:12345",
+	}
+}
+
+type TestShard struct {
+	addr string
+}
+
+func (s *TestShard) Equals(other Shard) bool { return true }
+func (s *TestShard) GetAddress() string      { return s.addr }