diff --git a/test/fixedbugs/issue44266.go b/test/fixedbugs/issue44266.go
new file mode 100644
index 0000000000..c683e56075
--- /dev/null
+++ b/test/fixedbugs/issue44266.go
@@ -0,0 +1,23 @@
+// errorcheck
+
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package p
+
+import "io"
+
+type T1 interface {
+	io.Reader
+}
+
+type T2 struct {
+	io.SectionReader
+}
+
+type T3 struct { // ERROR "invalid recursive type T3"
+	T1
+	T2
+	parent T3
+}