diff --git a/tests/src/com/fsck/k9/helper/HtmlConverterTest.java b/tests/src/com/fsck/k9/helper/HtmlConverterTest.java
index 8fe95476f..8592f6361 100644
--- a/tests/src/com/fsck/k9/helper/HtmlConverterTest.java
+++ b/tests/src/com/fsck/k9/helper/HtmlConverterTest.java
@@ -11,7 +11,7 @@ import static junit.framework.Assert.*;
 
 public class HtmlConverterTest {
     // Useful if you want to write stuff to a file for debugging in a browser.
-    private static final boolean WRITE_TO_FILE = true;
+    private static final boolean WRITE_TO_FILE = Boolean.parseBoolean(System.getProperty("k9.htmlConverterTest.writeToFile", "false"));
     private static final String OUTPUT_FILE = "C:/temp/parse.html";
 
     @Test