diff --git a/build/tests/allj.sh b/build/tests/allj.sh
index 219e4645..940cd775 100755
--- a/build/tests/allj.sh
+++ b/build/tests/allj.sh
@@ -1,3 +1,3 @@
 set -e
 
-java -classpath ../../lib/rhino/js.jar:../../lib/closure/compiler.jar org.mozilla.javascript.tools.shell.Main ../../r.js all.js
+java -classpath ../../lib/rhino/js.jar:../../lib/closure/compiler.jar org.mozilla.javascript.tools.shell.Main -opt -1 ../../r.js all.js
diff --git a/tests/allj.sh b/tests/allj.sh
index 13309036..e7acd740 100755
--- a/tests/allj.sh
+++ b/tests/allj.sh
@@ -1 +1 @@
-java -classpath ../lib/rhino/js.jar:../lib/closure.compiler.jar org.mozilla.javascript.tools.shell.Main ../r.js all.js
+java -classpath ../lib/rhino/js.jar:../lib/closure/compiler.jar org.mozilla.javascript.tools.shell.Main -opt -1 ../r.js all.js
diff --git a/tests/rhino/build.sh b/tests/rhino/build.sh
index d13298dc..0e7dc368 100755
--- a/tests/rhino/build.sh
+++ b/tests/rhino/build.sh
@@ -1,3 +1,3 @@
 set -e
 
-java -classpath ../../lib/rhino/js.jar:../../lib/closure.compiler.jar org.mozilla.javascript.tools.shell.Main build.js
+java -classpath ../../lib/rhino/js.jar:../../lib/closure/compiler.jar org.mozilla.javascript.tools.shell.Main build.js
diff --git a/tests/rhino/run.sh b/tests/rhino/run.sh
index fbaeaeba..104640f5 100755
--- a/tests/rhino/run.sh
+++ b/tests/rhino/run.sh
@@ -1,3 +1,3 @@
 set -e
 
-java -classpath ../../lib/rhino/js.jar:../../lib/closure.compiler.jar org.mozilla.javascript.tools.shell.Main run.js
+java -classpath ../../lib/rhino/js.jar:../../lib/closure/compiler.jar org.mozilla.javascript.tools.shell.Main run.js