3 files changed, 24 insertions, 0 deletions
diff --git a/test/files/run/reflection-tags.check b/test/files/run/reflection-tags.check
new file mode 100644
index 0000000000..375518e921
--- /dev/null
+++ b/test/files/run/reflection-tags.check
@@ -0,0 +1 @@
+List()
diff --git a/test/files/run/reflection-tags.scala b/test/files/run/reflection-tags.scala
new file mode 100644
index 0000000000..fba90f61e9
--- /dev/null
+++ b/test/files/run/reflection-tags.scala
@@ -0,0 +1,17 @@
+import scala.reflect.runtime.universe._
+import scala.reflect.ClassTag
+
+object Test extends App {
+  var typeMembers = typeOf[scala.reflect.api.Universe].members.filter(sym => sym.isType && !sym.isClass).toList
+  typeMembers = typeMembers.filter(_.name != TypeName("ModifiersCreator")) // type ModifiersCreator = ModifiersExtractor
+  val tags = typeOf[scala.reflect.api.Universe].members.filter(sym => sym.isImplicit).toList
+
+  typeMembers.foreach(_.typeSignature)
+  tags.foreach(_.typeSignature)
+
+  val outliers = typeMembers.filter(tm => !tags.exists(tag => tag.typeSignature match {
+    case NullaryMethodType(TypeRef(_, sym, targ :: Nil)) => sym == typeOf[ClassTag[_]].typeSymbol && targ.typeSymbol == tm
+    case _ => false
+  }))
+  println(outliers)
+}
+\ No newline at end of file
diff --git a/test/junit/scala/tools/nsc/symtab/SymbolTableForUnitTesting.scala b/test/junit/scala/tools/nsc/symtab/SymbolTableForUnitTesting.scala
index b42e9a07cb..25d8c4667f 100644
--- a/test/junit/scala/tools/nsc/symtab/SymbolTableForUnitTesting.scala
+++ b/test/junit/scala/tools/nsc/symtab/SymbolTableForUnitTesting.scala
@@ -1,6 +1,7 @@
 package scala.tools.nsc
 package symtab
 
+import scala.reflect.ClassTag
 import scala.reflect.internal.{Phase, NoPhase, SomePhase}
 import scala.tools.util.PathResolver
 import util.ClassPath
@@ -89,4 +90,9 @@ class SymbolTableForUnitTesting extends SymbolTable {
   val currentFreshNameCreator = new reflect.internal.util.FreshNameCreator
 
   phase = SomePhase
+
+  type RuntimeClass = java.lang.Class[_]
+  implicit val RuntimeClassTag: ClassTag[RuntimeClass] = ClassTag[RuntimeClass](classOf[RuntimeClass])
+  implicit val MirrorTag: ClassTag[Mirror] = ClassTag[Mirror](classOf[GlobalMirror])
+  implicit val TreeCopierTag: ClassTag[TreeCopier] = ClassTag[TreeCopier](classOf[TreeCopier])
 }