diff --git a/bencode/fuzz_test.go b/bencode/fuzz_test.go
index a4996df3..d0dce71f 100644
--- a/bencode/fuzz_test.go
+++ b/bencode/fuzz_test.go
@@ -34,3 +34,20 @@ func Fuzz(f *testing.F) {
 		c.Assert(d0, bencodeInterfaceChecker, d)
 	})
 }
+
+func FuzzInterfaceRoundTrip(f *testing.F) {
+	for _, ret := range random_encode_tests {
+		f.Add([]byte(ret.expected))
+	}
+	f.Fuzz(func(t *testing.T, b []byte) {
+		c := qt.New(t)
+		var d interface{}
+		err := Unmarshal(b, &d)
+		if err != nil {
+			c.Skip(err)
+		}
+		b0, err := Marshal(d)
+		c.Assert(err, qt.IsNil)
+		c.Check(b0, qt.DeepEquals, b)
+	})
+}
diff --git a/bencode/testdata/fuzz/FuzzInterfaceRoundTrip/1d7fd8d6b4e9380abbaa373f173a59a4d4418d23d3db9af8abd3ea5412c629c5 b/bencode/testdata/fuzz/FuzzInterfaceRoundTrip/1d7fd8d6b4e9380abbaa373f173a59a4d4418d23d3db9af8abd3ea5412c629c5
new file mode 100644
index 00000000..87fcc3d5
--- /dev/null
+++ b/bencode/testdata/fuzz/FuzzInterfaceRoundTrip/1d7fd8d6b4e9380abbaa373f173a59a4d4418d23d3db9af8abd3ea5412c629c5
@@ -0,0 +1,2 @@
+go test fuzz v1
+[]byte("00:")
diff --git a/bencode/testdata/fuzz/FuzzInterfaceRoundTrip/2674fedd58e056c9322ff8ed4bd0b23e2d9080499038d4353739f5c81b05fc0a b/bencode/testdata/fuzz/FuzzInterfaceRoundTrip/2674fedd58e056c9322ff8ed4bd0b23e2d9080499038d4353739f5c81b05fc0a
new file mode 100644
index 00000000..903e02e1
--- /dev/null
+++ b/bencode/testdata/fuzz/FuzzInterfaceRoundTrip/2674fedd58e056c9322ff8ed4bd0b23e2d9080499038d4353739f5c81b05fc0a
@@ -0,0 +1,2 @@
+go test fuzz v1
+[]byte("d3:000e")
diff --git a/bencode/testdata/fuzz/FuzzInterfaceRoundTrip/49dbd4b139383deb718477bee049320c697e6e7ae547e0a4c4ebd4c2cdd25c1b b/bencode/testdata/fuzz/FuzzInterfaceRoundTrip/49dbd4b139383deb718477bee049320c697e6e7ae547e0a4c4ebd4c2cdd25c1b
new file mode 100644
index 00000000..b2ace7b4
--- /dev/null
+++ b/bencode/testdata/fuzz/FuzzInterfaceRoundTrip/49dbd4b139383deb718477bee049320c697e6e7ae547e0a4c4ebd4c2cdd25c1b
@@ -0,0 +1,2 @@
+go test fuzz v1
+[]byte("i00e")