diff --git a/.travis.yml b/.travis.yml
index 9771061a..4bac75bb 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,13 +1,12 @@
 sudo: false
 language: java
-jdk: oraclejdk8
+jdk: openjdk8
 cache:
     apt: true
     directories:
         - $HOME/.m2
+services:
+    - xvfb
 script: mvn clean verify -Pjacoco coveralls:report
-before_install:
-  - "export DISPLAY=:99.0"
-  - "sh -e /etc/init.d/xvfb start"
 notifications:
     slack: cunyponder:A8GuEoj0voEn2H7MJDL1eNji
diff --git a/edu.cuny.hunter.streamrefactoring.tests/pom.xml b/edu.cuny.hunter.streamrefactoring.tests/pom.xml
index 3f9b0ca6..6f7e8192 100644
--- a/edu.cuny.hunter.streamrefactoring.tests/pom.xml
+++ b/edu.cuny.hunter.streamrefactoring.tests/pom.xml
@@ -19,7 +19,7 @@
         </os>
       </activation>
       <properties>
-        <ui.test.vmargs>${tycho.testArgLine} -XstartOnFirstThread</ui.test.vmargs>
+        <ui.test.vmargs>${tycho.testArgLine} -XstartOnFirstThread -Xmx4g -XX:MaxPermSize=1g</ui.test.vmargs>
         <argLine>${ui.test.vmargs}</argLine>
       </properties>
     </profile>
@@ -33,7 +33,7 @@
       </activation>
       <properties>
         <ui.test.vmargs>${tycho.testArgLine}</ui.test.vmargs>
-        <argLine>${ui.test.vmargs}</argLine>
+        <argLine>${ui.test.vmargs} -Xmx4g -XX:MaxPermSize=1g</argLine>
       </properties>
     </profile>
   </profiles>
diff --git a/edu.cuny.hunter.streamrefactoring.tests/resources/ConvertStreamToParallel/testMotivatingExample/in/A.java b/edu.cuny.hunter.streamrefactoring.tests/resources/ConvertStreamToParallel/testMotivatingExample/in/A.java
index 21795018..873a99e1 100644
--- a/edu.cuny.hunter.streamrefactoring.tests/resources/ConvertStreamToParallel/testMotivatingExample/in/A.java
+++ b/edu.cuny.hunter.streamrefactoring.tests/resources/ConvertStreamToParallel/testMotivatingExample/in/A.java
@@ -10,6 +10,8 @@
 import java.util.regex.Pattern;
 import java.util.stream.Collectors;
 
+import p.Widget.Color;
+
 import edu.cuny.hunter.streamrefactoring.annotations.*;
 
 class Widget {
@@ -59,5 +61,30 @@ void m() {
 		// sequentially skip the first 1000 widgets and
 		// collect the remaining into a list.
 		List<Widget> skippedWidgetList = orderedWidgets.stream().skip(1000).collect(Collectors.toList());
+
+		Collection<Widget> orderedWidgets2 = orderedWidgets;
+
+		// collect the first green widgets into a list.
+		List<Widget> firstGreenList = orderedWidgets2.stream().filter(w -> w.getColor() == Color.GREEN).unordered()
+				.limit(5).collect(Collectors.toList());
+
+		Collection<Widget> orderedWidgets3 = orderedWidgets;
+
+		// collect distinct widget weights into a set.
+		Set<Double> distinctWeightSet = orderedWidgets3.stream().parallel().map(Widget::getWeight).distinct()
+				.collect(Collectors.toCollection(TreeSet::new));
+
+		// collect distinct widget colors into a HashSet.
+		Set<Color> distinctColorSet = orderedWidgets2.parallelStream().map(Widget::getColor).distinct()
+				.collect(HashSet::new, Set::add, Set::addAll);
+
+		// collect widget colors matching a regex.
+		Pattern pattern = Pattern.compile(".*e[a-z]");
+		ArrayList<String> results = new ArrayList<>();
+
+		Collection<Widget> orderedWidgets4 = orderedWidgets;
+
+		orderedWidgets4.stream().map(w -> w.getColor()).map(c -> c.toString()).filter(s -> pattern.matcher(s).matches())
+				.forEach(s -> results.add(s));
 	}
-}
\ No newline at end of file
+}
diff --git a/edu.cuny.hunter.streamrefactoring.tests/test cases/edu/cuny/hunter/streamrefactoring/ui/tests/ConvertStreamToParallelRefactoringTest.java b/edu.cuny.hunter.streamrefactoring.tests/test cases/edu/cuny/hunter/streamrefactoring/ui/tests/ConvertStreamToParallelRefactoringTest.java
index dc7e0a94..4ea990f4 100644
--- a/edu.cuny.hunter.streamrefactoring.tests/test cases/edu/cuny/hunter/streamrefactoring/ui/tests/ConvertStreamToParallelRefactoringTest.java	
+++ b/edu.cuny.hunter.streamrefactoring.tests/test cases/edu/cuny/hunter/streamrefactoring/ui/tests/ConvertStreamToParallelRefactoringTest.java	
@@ -625,12 +625,32 @@ public void testMotivatingExample() throws Exception {
 				Collections.emptySet()),
 
 				new StreamAnalysisExpectedResult("orderedWidgets.parallelStream()", EnumSet.of(ExecutionMode.PARALLEL),
-						EnumSet.of(Ordering.ORDERED), false, false, false, null, null, null, RefactoringStatus.ERROR,
+						EnumSet.of(Ordering.ORDERED), false, false, true, null, null, null, RefactoringStatus.ERROR,
 						EnumSet.of(PreconditionFailure.NO_STATEFUL_INTERMEDIATE_OPERATIONS)),
 
 				new StreamAnalysisExpectedResult("orderedWidgets.stream()", EnumSet.of(ExecutionMode.SEQUENTIAL),
 						EnumSet.of(Ordering.ORDERED), false, true, true, null, null, null, RefactoringStatus.ERROR,
-						EnumSet.of(PreconditionFailure.REDUCE_ORDERING_MATTERS)));
+						EnumSet.of(PreconditionFailure.REDUCE_ORDERING_MATTERS)),
+
+				new StreamAnalysisExpectedResult("orderedWidgets2.stream()", EnumSet.of(ExecutionMode.SEQUENTIAL),
+						EnumSet.of(Ordering.UNORDERED), false, true, true,
+						EnumSet.of(TransformationAction.CONVERT_TO_PARALLEL), PreconditionSuccess.P1,
+						Refactoring.CONVERT_SEQUENTIAL_STREAM_TO_PARALLEL, RefactoringStatus.OK,
+						Collections.emptySet()),
+
+				new StreamAnalysisExpectedResult("orderedWidgets3.stream()", EnumSet.of(ExecutionMode.PARALLEL),
+						EnumSet.of(Ordering.ORDERED), false, true, true,
+						EnumSet.of(TransformationAction.CONVERT_TO_SEQUENTIAL), PreconditionSuccess.P5,
+						Refactoring.OPTIMIZE_PARALLEL_STREAM, RefactoringStatus.OK, Collections.emptySet()),
+
+				new StreamAnalysisExpectedResult("orderedWidgets2.parallelStream()", EnumSet.of(ExecutionMode.PARALLEL),
+						EnumSet.of(Ordering.ORDERED), false, true, false, EnumSet.of(TransformationAction.UNORDER),
+						PreconditionSuccess.P4, Refactoring.OPTIMIZE_PARALLEL_STREAM, RefactoringStatus.OK,
+						Collections.emptySet()),
+
+				new StreamAnalysisExpectedResult("orderedWidgets4.stream()", EnumSet.of(ExecutionMode.SEQUENTIAL),
+						EnumSet.of(Ordering.ORDERED), true, false, false, null, null, null, RefactoringStatus.ERROR,
+						EnumSet.of(PreconditionFailure.HAS_SIDE_EFFECTS2)));
 	}
 
 	public void testTerminalOp1() throws Exception {
diff --git a/scripts/keep_alive.sh b/scripts/keep_alive.sh
new file mode 100755
index 00000000..900c05d7
--- /dev/null
+++ b/scripts/keep_alive.sh
@@ -0,0 +1,10 @@
+#!/bin/bash
+set -ev
+function write_visual_bells() {
+  for i in `seq 1 40`; do
+    echo -en "\a"
+    sleep 1m
+  done
+}
+write_visual_bells&
+mvn install