diff --git a/build/scripts/tests.gant b/build/scripts/tests.gant
index e4aada4b821a..03e790c6a7c1 100644
--- a/build/scripts/tests.gant
+++ b/build/scripts/tests.gant
@@ -26,7 +26,8 @@ if ("GIT_TESTS".equalsIgnoreCase(System.getProperty("idea.test.group"))) {
 def args = [
   "-Xmx450m",
   "-XX:MaxPermSize=430m",
-  "-XX:ReservedCodeCacheSize=96m"
+  "-XX:ReservedCodeCacheSize=96m",
+  "-Dsun.io.useCanonCaches=false"
 ]
 
 if (System.getProperty("os.name").toLowerCase().startsWith("mac")) {