2 files changed, 19 insertions, 1 deletions
diff --git a/test/files/run/t4332.scala b/test/files/run/t4332.scala
index 5a67922911..1c7e7d73de 100644
--- a/test/files/run/t4332.scala
+++ b/test/files/run/t4332.scala
@@ -12,7 +12,7 @@ object Test extends DirectTest {
   }
 
   def isExempt(sym: Symbol) = {
-    val exempt = Set("view", "repr", "sliceWithKnownDelta", "sliceWithKnownBound", "transform")
+    val exempt = Set("view", "repr", "sliceWithKnownDelta", "sliceWithKnownBound", "transform", "filterImpl")
     (exempt contains sym.name.decoded)
   }
 
diff --git a/test/junit/scala/collection/StreamTest.scala b/test/junit/scala/collection/StreamTest.scala
new file mode 100644
index 0000000000..6dc1c79a48
--- /dev/null
+++ b/test/junit/scala/collection/StreamTest.scala
@@ -0,0 +1,18 @@
+package scala.collection.immutable
+
+import org.junit.runner.RunWith
+import org.junit.runners.JUnit4
+import org.junit.Test
+import org.junit.Assert._
+
+@RunWith(classOf[JUnit4])
+class StreamTest {
+
+  @Test
+  def t6727_and_t6440(): Unit = {
+    assertTrue(Stream.continually(()).filter(_ => true).take(2) == Seq((), ()))
+    assertTrue(Stream.continually(()).filterNot(_ => false).take(2) == Seq((), ()))
+    assertTrue(Stream(1,2,3,4,5).filter(_ < 4) == Seq(1,2,3))
+    assertTrue(Stream(1,2,3,4,5).filterNot(_ > 4) == Seq(1,2,3,4))
+  }
+}