diff --git a/extra/images/bitmap/bitmap-tests.factor b/extra/images/bitmap/bitmap-tests.factor
index 2ac2fed4d1..cae6655984 100644
--- a/extra/images/bitmap/bitmap-tests.factor
+++ b/extra/images/bitmap/bitmap-tests.factor
@@ -1,6 +1,8 @@
-USING: images.bitmap images.testing kernel ;
+USING: images.bitmap images.loader images.testing kernel ;
 IN: images.bitmap.tests
 
+"bmp" bmp-image register-image-class
+
 ! "vocab:images/testing/bmp/1bit.bmp" decode-test
 ! "vocab:images/testing/bmp/rgb_4bit.bmp" decode-test
 
diff --git a/extra/images/png/png-tests.factor b/extra/images/png/png-tests.factor
index acccc84e37..781aad58e1 100644
--- a/extra/images/png/png-tests.factor
+++ b/extra/images/png/png-tests.factor
@@ -1,8 +1,10 @@
 ! Copyright (C) 2009 Doug Coleman, Keith Lazuka
 ! See http://factorcode.org/license.txt for BSD license.
-USING: images.testing io.directories ;
+USING: images.loader images.png images.testing io.directories ;
 IN: images.png.tests
 
+"png" png-image register-image-class
+
 ! Test files from PngSuite (http://www.libpng.org/pub/png/pngsuite.html)
 
 ! The subset of the suite that should work given the current implementation.