diff --git a/summingbird-core-test/src/main/scala/com/twitter/summingbird/ArbitraryWorkaround.scala b/summingbird-core-test/src/main/scala/com/twitter/summingbird/ArbitraryWorkaround.scala
deleted file mode 100644
index 4cc8ade2a..000000000
--- a/summingbird-core-test/src/main/scala/com/twitter/summingbird/ArbitraryWorkaround.scala
+++ /dev/null
@@ -1,26 +0,0 @@
-package com.twitter.summingbird
-
-import org.scalacheck.{ Arbitrary, Gen }
-
-/**
- * [[org.scalacheck.GenArities]] and [[org.scalacheck.ArbitraryArities]] classes from scalacheck
- * contains to many lambdas in the same file which leads to
- * bug with functions serialization in Scala 2.12: https://issues.scala-lang.org/browse/SI-10232
- *
- * As a workaround this class contains overriden implicits for such cases.
- * Should be imported if you import [[Arbitrary]] class.
- *
- * ScalaCheck issue is tracked at https://github.com/rickynils/scalacheck/issues/342.
- */
-object ArbitraryWorkaround {
-  implicit val f1: Arbitrary[Int => Int] = Arbitrary(Gen.const(x => x * 2))
-  implicit val f2: Arbitrary[Int => List[(Int, Int)]] = Arbitrary(Gen.const(x => List((x, x * 3))))
-  implicit val f3: Arbitrary[Int => Option[Int]] = Arbitrary(Gen.const(x => {
-    if (x % 2 == 0) None else Some(x * 4)
-  }))
-  implicit val f4: Arbitrary[Int => List[Int]] = Arbitrary(Gen.const(x => List(x * 5)))
-  implicit val f5: Arbitrary[((Int, (Int, Option[Int]))) => List[(Int, Int)]] = Arbitrary(Gen.const {
-    case (x, (y, optZ)) => List((x, y), (x, optZ.getOrElse(42)))
-  })
-  implicit val f6: Arbitrary[((Int, Int)) => List[(Int, Int)]] = Arbitrary(Gen.const(x => List(x, x)))
-}
diff --git a/summingbird-scalding-test/src/test/scala/com/twitter/summingbird/scalding/ScaldingLaws.scala b/summingbird-scalding-test/src/test/scala/com/twitter/summingbird/scalding/ScaldingLaws.scala
index c75a5efaa..36c4858c8 100644
--- a/summingbird-scalding-test/src/test/scala/com/twitter/summingbird/scalding/ScaldingLaws.scala
+++ b/summingbird-scalding-test/src/test/scala/com/twitter/summingbird/scalding/ScaldingLaws.scala
@@ -25,7 +25,6 @@ import com.twitter.summingbird.SummingbirdRuntimeStats
 import com.twitter.scalding.{ Test => TestMode, _ }
 
 import org.scalacheck.Arbitrary
-import com.twitter.summingbird.ArbitraryWorkaround._
 import org.scalacheck.Cogen
 
 import org.apache.hadoop.conf.Configuration
diff --git a/summingbird-scalding-test/src/test/scala/com/twitter/summingbird/scalding/VersionBatchedStoreTest.scala b/summingbird-scalding-test/src/test/scala/com/twitter/summingbird/scalding/VersionBatchedStoreTest.scala
index dcf224b87..e98a0ba0b 100644
--- a/summingbird-scalding-test/src/test/scala/com/twitter/summingbird/scalding/VersionBatchedStoreTest.scala
+++ b/summingbird-scalding-test/src/test/scala/com/twitter/summingbird/scalding/VersionBatchedStoreTest.scala
@@ -28,7 +28,6 @@ import java.io.File
 import com.twitter.scalding._
 
 import org.scalacheck.Arbitrary
-import com.twitter.summingbird.ArbitraryWorkaround._
 
 import org.scalatest.WordSpec
 
diff --git a/summingbird-storm-test/src/test/scala/com/twitter/summingbird/storm/StormLaws.scala b/summingbird-storm-test/src/test/scala/com/twitter/summingbird/storm/StormLaws.scala
index 6a7b6fc40..73465d331 100644
--- a/summingbird-storm-test/src/test/scala/com/twitter/summingbird/storm/StormLaws.scala
+++ b/summingbird-storm-test/src/test/scala/com/twitter/summingbird/storm/StormLaws.scala
@@ -21,7 +21,6 @@ import com.twitter.summingbird.batch.Batcher
 import com.twitter.summingbird.online.option.LeftJoinGrouping
 import org.scalatest.WordSpec
 import org.scalacheck.Arbitrary
-import com.twitter.summingbird.ArbitraryWorkaround._
 
 /**
  * Tests for Summingbird's Storm planner.