diff --git a/src/library/scala/Predef.scala b/src/library/scala/Predef.scala
index 281e0563305a..fa58015a84b5 100644
--- a/src/library/scala/Predef.scala
+++ b/src/library/scala/Predef.scala
@@ -269,13 +269,6 @@ object Predef extends LowPriorityImplicits with DeprecatedPredef {
     @inline def formatted(fmtstr: String): String = fmtstr format self
   }
 
-  // TODO: remove, only needed for binary compatibility of 2.11.0-RC1 with 2.11.0-M8
-  // note that `private[scala]` becomes `public` in bytecode
-  private[scala] final class StringAdd[A](private val self: A) extends AnyVal {
-    def +(other: String): String = String.valueOf(self) + other
-  }
-  private[scala] def StringAdd(x: Any): Any = new StringAdd(x)
-
   // SI-8229 retaining the pre 2.11 name for source compatibility in shadowing this implicit
   implicit final class any2stringadd[A](private val self: A) extends AnyVal {
     def +(other: String): String = String.valueOf(self) + other
diff --git a/src/library/scala/collection/immutable/Stream.scala b/src/library/scala/collection/immutable/Stream.scala
index 6c5b10e73b33..1d0d40a1d81a 100644
--- a/src/library/scala/collection/immutable/Stream.scala
+++ b/src/library/scala/collection/immutable/Stream.scala
@@ -509,21 +509,6 @@ self =>
     else Stream.Empty
   }
 
-  /** Returns all the elements of this `Stream` that satisfy the predicate `p`
-   * in a new `Stream` - i.e., it is still a lazy data structure. The order of
-   * the elements is preserved
-   *
-   *  @param p the predicate used to filter the stream.
-   *  @return the elements of this stream satisfying `p`.
-   *
-   * @example {{{
-   * $naturalsEx
-   * naturalsFrom(1)  10 } filter { _ % 5 == 0 } take 10 mkString(", ")
-   * // produces
-   * }}}
-   */
-  override def filter(p: A => Boolean): Stream[A] = filterImpl(p, isFlipped = false) // This override is only left in 2.11 because of binary compatibility, see PR #3925
-
   /** A FilterMonadic which allows GC of the head of stream during processing */
   @noinline // Workaround SI-9137, see https://github.com/scala/scala/pull/4284#issuecomment-73180791
   override final def withFilter(p: A => Boolean): FilterMonadic[A, Stream[A]] = new Stream.StreamWithFilter(this, p)
diff --git a/versions.properties b/versions.properties
index be197af2ace0..e18229ae26bd 100644
--- a/versions.properties
+++ b/versions.properties
@@ -30,7 +30,7 @@ jline.version=2.12.1
 scala-asm.version=5.0.4-scala-2
 
 # external modules, used internally (not shipped)
-partest.version.number=1.0.7
+partest.version.number=1.0.9
 scalacheck.version.number=1.11.6
 
 # TODO: modularize the compiler