diff --git a/.travis.yml b/.travis.yml
index 07835e1d78..b573ad5e80 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,5 +7,6 @@ env:
 before_install:
     - curl https://download.calibre-ebook.com/travis/sw-linux.tar.xz | tar xJ -C $HOME
     - $QMAKE -query
+    - QT_DEBUG_PLUGINS=1 python -c "from PyQt5.Qt import QImageReader; fmts = map(str, QImageReader.supportedImageFormats()); print fmts; import sys; 'jpg' not in fmts and sys.exit(1)"
     - python setup.py bootstrap --ephemeral
 script: python setup.py test