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diff --git a/test/files/run/null-and-intersect.check b/test/files/run/null-and-intersect.check
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index 0000000000..81890cfeff
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+++ b/test/files/run/null-and-intersect.check
@@ -0,0 +1,9 @@
+1
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diff --git a/test/files/run/null-and-intersect.scala b/test/files/run/null-and-intersect.scala
new file mode 100644
index 0000000000..7266dabe6d
--- /dev/null
+++ b/test/files/run/null-and-intersect.scala
@@ -0,0 +1,34 @@
+object Test {
+  trait Immortal
+  class Bippy extends Immutable with Immortal
+  class Boppy extends Immutable
+
+  def f[T](x: Traversable[T]) = x match {
+    case _: Map[_, _]   => 3
+    case _: Seq[_]      => 2
+    case _: Iterable[_] => 1
+    case _              => 4
+  }
+  def g(x: Bippy) = x match {
+    case _: Immutable with Immortal => 1
+    case _                          => 2
+  }
+  def h(x: Immutable) = x match {
+    case _: Immortal => 1
+    case _           => 2
+  }
+
+  def main(args: Array[String]): Unit = {
+    println(f(Set(1)))
+    println(f(Seq(1)))
+    println(f(Map(1 -> 2)))
+    println(f(null))
+
+    println(g(new Bippy))
+    println(g(null))
+
+    println(h(new Bippy))
+    println(h(new Boppy))
+    println(h(null))
+  }
+}