diff --git a/crypto/multiset/multiset_test.go b/crypto/multiset/multiset_test.go
new file mode 100644
index 0000000000..65ac872d51
--- /dev/null
+++ b/crypto/multiset/multiset_test.go
@@ -0,0 +1,57 @@
+package multiset
+
+import (
+	"testing"
+)
+
+func TestAddRemove(t *testing.T) {
+	set := New()
+	set.Add([]byte("The"))
+	// set = [The]
+	if hash := set.Hash().String(); hash != "0xdc1e608f9aaaa215a3f3b87fbdfd398bd07cf0849440673c60d20fea9585035f" {
+		t.Fatal("Hash mismatch:", hash)
+	}
+	// set = [The,quick]
+	set.Add([]byte("quick"))
+	if hash := set.Hash().String(); hash != "0x3e7044c8e3cf5ebbfed510ae659289e16abe55921fdadda74ab46b528142700a" {
+		t.Fatal("Hash mismatch:", hash)
+	}
+	// set = [quick]
+	set.Remove([]byte("The"))
+	if hash := set.Hash().String(); hash != "0xf9baf7a2647ca56d5db8aa4a6c0e4d3b32f248ba021e6efe8bf3528f167063dc" {
+		t.Fatal("Hash mismatch:", hash)
+	}
+	set.Add([]byte("The"))
+	set.Remove([]byte("quick"))
+	// set = [The]
+	if hash := set.Hash().String(); hash != "0xdc1e608f9aaaa215a3f3b87fbdfd398bd07cf0849440673c60d20fea9585035f" {
+		t.Fatal("Hash mismatch:", hash)
+	}
+}
+
+func TestClone(t *testing.T) {
+	set1 := New()
+	set1.Add([]byte("The quick brown fox"))
+	set2 := set1.Clone()
+	if hash := set1.Hash().String(); hash != "0xb56e1a0d2963836af3dd9eb6aec412cbe3a8e1f61c5c01e72605d2a57677070a" {
+		t.Fatal("Hash mismatch:", hash)
+	}
+	if hash := set2.Hash().String(); hash != "0xb56e1a0d2963836af3dd9eb6aec412cbe3a8e1f61c5c01e72605d2a57677070a" {
+		t.Fatal("Hash mismatch:", hash)
+	}
+}
+
+func TestSerdes(t *testing.T) {
+	set1 := New()
+	set1.Add([]byte("The quick brown fox"))
+	set2, err := FromBytes(set1.Serialize())
+	if err != nil {
+		t.Fatal("Decode error:", err)
+	}
+	if hash := set1.Hash().String(); hash != "0xb56e1a0d2963836af3dd9eb6aec412cbe3a8e1f61c5c01e72605d2a57677070a" {
+		t.Fatal("Hash mismatch:", hash)
+	}
+	if hash := set2.Hash().String(); hash != "0xb56e1a0d2963836af3dd9eb6aec412cbe3a8e1f61c5c01e72605d2a57677070a" {
+		t.Fatal("Hash mismatch:", hash)
+	}
+}