diff --git a/internal/compiler-bridge/src/main/scala-2.12/xsbt/Compat.scala b/internal/compiler-bridge/src/main/scala-2.12/xsbt/Compat.scala
index 48a691e6f8..a9c129a13b 100644
--- a/internal/compiler-bridge/src/main/scala-2.12/xsbt/Compat.scala
+++ b/internal/compiler-bridge/src/main/scala-2.12/xsbt/Compat.scala
@@ -22,7 +22,11 @@ abstract class Compat {
 
   /** If given tree contains object tree attachment calls func on tree from attachment. */
   protected def processOriginalTreeAttachment(in: Tree)(func: Tree => Unit): Unit = {
-    Compat.OriginalTreeTraverser.Instance.traverseOriginal(in)(func)
+    // We can't until we figure out how to conditionally do this for Scala 2.12.3+
+    // import analyzer._
+    // in.attachments.get[OriginalTreeAttachment].foreach { a =>
+    //  func(a.original)
+    // }
   }
 }
 object Compat {
@@ -31,32 +35,6 @@ object Compat {
 
   // IMain in 2.13 accepts ReplReporter
   def replReporter(settings: Settings, writer: PrintWriter) = writer
-
-  sealed abstract class OriginalTreeTraverser private {
-    def traverseOriginal[T <: Global#Tree](t: T)(f: T => Unit): Unit
-  }
-
-  object OriginalTreeTraverser {
-    private[this] val cls = try {
-      Class.forName("scala.tools.nsc.typechecker.StdAttachments$OriginalTreeAttachment")
-    } catch { case _: Throwable => null }
-
-    private object Reflective extends OriginalTreeTraverser {
-      private[this] val ct = scala.reflect.ClassTag[AnyRef](cls)
-      private[this] val meth = cls.getMethod("original")
-      def traverseOriginal[T <: Global#Tree](t: T)(f: T => Unit): Unit =
-        t.attachments.get(ct) match {
-          case Some(attachment) => f(meth.invoke(attachment).asInstanceOf[T])
-          case None             =>
-        }
-    }
-
-    private object NoOp extends OriginalTreeTraverser {
-      def traverseOriginal[T <: Global#Tree](t: T)(f: T => Unit): Unit = ()
-    }
-
-    val Instance = if (cls == null) NoOp else Reflective
-  }
 }
 
 /** Defines compatibility utils for [[ZincCompiler]]. */
diff --git a/project/Dependencies.scala b/project/Dependencies.scala
index eb32fe66c2..ceead04ca8 100644
--- a/project/Dependencies.scala
+++ b/project/Dependencies.scala
@@ -14,7 +14,7 @@ object Dependencies {
   val scala212_213 = Seq(defaultScalaVersion, scala213)
 
   private val ioVersion = nightlyVersion.getOrElse("1.5.1")
-  private val utilVersion = nightlyVersion.getOrElse("1.5.6")
+  private val utilVersion = nightlyVersion.getOrElse("1.5.7")
 
   private val sbtIO = "org.scala-sbt" %% "io" % ioVersion
 
@@ -84,7 +84,7 @@ object Dependencies {
   }
   val zeroAllocationHashing = "net.openhft" % "zero-allocation-hashing" % "0.10.1"
 
-  def log4jVersion = "2.11.2"
+  def log4jVersion = "2.16.0"
   val log4jApi = "org.apache.logging.log4j" % "log4j-api" % log4jVersion
   val log4jCore = "org.apache.logging.log4j" % "log4j-core" % log4jVersion
   val log4jSlf4jImpl = "org.apache.logging.log4j" % "log4j-slf4j-impl" % log4jVersion
diff --git a/zinc/src/sbt-test/source-dependencies/constants/test b/zinc/src/sbt-test/source-dependencies/constants/disabled
similarity index 100%
rename from zinc/src/sbt-test/source-dependencies/constants/test
rename to zinc/src/sbt-test/source-dependencies/constants/disabled
diff --git a/zinc/src/test/scala/sbt/inc/BaseCompilerSpec.scala b/zinc/src/test/scala/sbt/inc/BaseCompilerSpec.scala
index 8fafc985bc..7a332ab9ac 100644
--- a/zinc/src/test/scala/sbt/inc/BaseCompilerSpec.scala
+++ b/zinc/src/test/scala/sbt/inc/BaseCompilerSpec.scala
@@ -49,6 +49,8 @@ class BaseCompilerSpec extends BridgeProviderSpecification {
 
   implicit class ProjectSetupOps(setup: ProjectSetup) {
     def createCompiler(): CompilerSetup = setup.createCompiler(scalaVersion, incOptions)
+    def createCompiler(scalaVersion: String): CompilerSetup =
+      setup.createCompiler(scalaVersion, incOptions)
 
     private def createCompiler(sv: String, incOptions: IncOptions): CompilerSetup = {
       val si = scalaInstance(sv, setup.baseDir, Logger.Null)
diff --git a/zinc/src/test/scala/sbt/inc/IncrementalCompilerSpec.scala b/zinc/src/test/scala/sbt/inc/IncrementalCompilerSpec.scala
index 90501bf5b9..eb4afca004 100644
--- a/zinc/src/test/scala/sbt/inc/IncrementalCompilerSpec.scala
+++ b/zinc/src/test/scala/sbt/inc/IncrementalCompilerSpec.scala
@@ -192,7 +192,7 @@ class IncrementalCompilerSpec extends BaseCompilerSpec {
 
   it should "track dependencies on constants" in withTmpDir { tmp =>
     val project = VirtualSubproject(tmp.toPath / "p1")
-    val comp = project.setup.createCompiler()
+    val comp = project.setup.createCompiler("2.13.6")
     try {
       val s1 = "object A { final val i = 1 }"
       val s1b = "object A { final val i = 2 }"