diff --git a/jsr166-tests/src/test/java/jsr166/Collection8Test.java b/jsr166-tests/src/test/java/jsr166/Collection8Test.java
index 0204ce6..3aa1614 100644
--- a/jsr166-tests/src/test/java/jsr166/Collection8Test.java
+++ b/jsr166-tests/src/test/java/jsr166/Collection8Test.java
@@ -26,7 +26,8 @@
  * Contains tests applicable to all jdk8+ Collection implementations.
  * An extension of CollectionTest.
  */
-public class Collection8Test extends JSR166TestCase {
+// Android-changed: Made class abstract so it will be ignored by test runners.
+public abstract class Collection8Test extends JSR166TestCase {
     final CollectionImplementation impl;
 
     /** Tests are parameterized by a Collection implementation. */
diff --git a/jsr166-tests/src/test/java/jsr166/CollectionTest.java b/jsr166-tests/src/test/java/jsr166/CollectionTest.java
index 984439a..b75c672 100644
--- a/jsr166-tests/src/test/java/jsr166/CollectionTest.java
+++ b/jsr166-tests/src/test/java/jsr166/CollectionTest.java
@@ -14,7 +14,8 @@
 /**
  * Contains tests applicable to all Collection implementations.
  */
-class CollectionTest extends JSR166TestCase {
+// Android-changed: Made class abstract so it will be ignored by test runners.
+abstract class CollectionTest extends JSR166TestCase {
     final CollectionImplementation impl;
 
     /** Tests are parameterized by a Collection implementation. */