--- old/test/langtools/TEST.ROOT	2018-02-26 08:32:27.921683440 -0800
+++ new/test/langtools/TEST.ROOT	2018-02-26 08:32:27.619676051 -0800
@@ -11,6 +11,9 @@
 
 keys=intermittent randomness
 
+# Tests that cannot run concurrently                                                                                                                 
+exclusiveAccess.dirs=jdk/jshell
+
 # Group definitions
 groups=TEST.groups