diff --git a/tests/neg/i7325.scala b/tests/neg/i7325.scala
new file mode 100644
index 000000000000..a47d416aaedb
--- /dev/null
+++ b/tests/neg/i7325.scala
@@ -0,0 +1,9 @@
+import scala.collection._
+
+class MySeq[A](private val underlying: Seq[A]) // error
+  extends Seq[A]
+  with SeqOps[A, MySeq, MySeq[A]] {
+  def apply(n: Int) = underlying(n)
+  def iterator = underlying.iterator
+  def length = underlying.size
+}