diff --git a/peer_protocol/decoder_fuzz_test.go b/peer_protocol/fuzz_test.go
similarity index 75%
rename from peer_protocol/decoder_fuzz_test.go
rename to peer_protocol/fuzz_test.go
index 2fd357e4..2c92c70c 100644
--- a/peer_protocol/decoder_fuzz_test.go
+++ b/peer_protocol/fuzz_test.go
@@ -1,3 +1,5 @@
+//go:build go1.18
+
 package peer_protocol
 
 import (
@@ -43,3 +45,14 @@ func FuzzDecoder(f *testing.F) {
 		c.Assert(buf.Bytes(), qt.DeepEquals, b)
 	})
 }
+
+func FuzzMessageMarshalBinary(f *testing.F) {
+	f.Fuzz(func(t *testing.T, b []byte) {
+		var m Message
+		if err := m.UnmarshalBinary(b); err != nil {
+			t.Skip(err)
+		}
+		b0 := m.MustMarshalBinary()
+		qt.Assert(t, b0, qt.DeepEquals, b)
+	})
+}
diff --git a/peer_protocol/msg_fuzz_test.go b/peer_protocol/msg_fuzz_test.go
deleted file mode 100644
index 9e214b30..00000000
--- a/peer_protocol/msg_fuzz_test.go
+++ /dev/null
@@ -1,18 +0,0 @@
-package peer_protocol
-
-import (
-	"testing"
-
-	qt "github.com/frankban/quicktest"
-)
-
-func FuzzMessageMarshalBinary(f *testing.F) {
-	f.Fuzz(func(t *testing.T, b []byte) {
-		var m Message
-		if err := m.UnmarshalBinary(b); err != nil {
-			t.Skip(err)
-		}
-		b0 := m.MustMarshalBinary()
-		qt.Assert(t, b0, qt.DeepEquals, b)
-	})
-}