diff --git a/imageio/imageio-core/src/test/java/com/twelvemonkeys/imageio/util/ImageReaderAbstractTestCase.java b/imageio/imageio-core/src/test/java/com/twelvemonkeys/imageio/util/ImageReaderAbstractTestCase.java
index d62ccc43..7b1f2a14 100644
--- a/imageio/imageio-core/src/test/java/com/twelvemonkeys/imageio/util/ImageReaderAbstractTestCase.java
+++ b/imageio/imageio-core/src/test/java/com/twelvemonkeys/imageio/util/ImageReaderAbstractTestCase.java
@@ -70,6 +70,7 @@ public abstract class ImageReaderAbstractTestCase<T extends ImageReader> {
 
     static {
         IIORegistry.getDefaultInstance().registerServiceProvider(new URLImageInputStreamSpi());
+        ImageIO.setUseCache(false);
     }
 
     protected abstract List<TestData> getTestData();