diff --git a/debian/changelog b/debian/changelog
index 7e8847008a275d74914cc77b9dd34504287543a3..ce0ae3fd97829bc107522fd128fcdde2d13ebd14 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -2,8 +2,11 @@ scikit-learn (0.7.1.dfsg-3) unstable; urgency=low
 
   * Do not build documentation in -a mode, to prevent timeouts on buildd
     servers
+  * Use JOBLIB_MULTIPROCESSING=0 to suppress use of multiprocessing by
+    joblib while running tests to prevent failures in chroots without
+    /dev/shm mounted
 
- -- Yaroslav Halchenko <debian@onerussian.com>  Wed, 13 Apr 2011 16:27:14 -0400
+ -- Yaroslav Halchenko <debian@onerussian.com>  Wed, 13 Apr 2011 17:18:46 -0400
 
 scikit-learn (0.7.1.dfsg-2) unstable; urgency=low
 
diff --git a/debian/rules b/debian/rules
index 164ec6eeab5d6582f36be27c3bb525e16ca8f430..9543666c4f83ed3ba3da8fd9e4b81ddfcb868d06 100755
--- a/debian/rules
+++ b/debian/rules
@@ -28,6 +28,7 @@ ifeq (,$(filter nocheck,$(DEB_BUILD_OPTIONS)))
 	: # Run unittests here against installed scikits.learn
 	export PYTHONPATH=`/bin/ls -d $$PWD/$(PACKAGE_ROOT_DIR)/usr/lib/python$*/*/`; \
 	export MPLCONFIGDIR=$(CURDIR)/build HOME=$(CURDIR)/build; \
+	export JOBLIB_MULTIPROCESSING=0; \
 	cd build/; python$* /usr/bin/nosetests -s scikits.learn; \
 			   python$* /usr/bin/nosetests --with-doctest --doctest-extension=rst ../doc/
 else