diff --git a/debian/patches/prefix.patch b/debian/patches/prefix.patch
index e8cc5146b..bb0da1c5c 100644
--- a/debian/patches/prefix.patch
+++ b/debian/patches/prefix.patch
@@ -5,7 +5,7 @@ use the debian layout when installing python modules
 
 --- a/Makefile
 +++ b/Makefile
-@@ -96,9 +96,9 @@ client-install: client client-dirs
+@@ -95,9 +95,9 @@ client-install: client client-dirs
  	done
  	cd install/po && $(MAKE) install || exit 1;
  	if [ "$(DESTDIR)" = "" ]; then \
@@ -26,6 +26,15 @@ use the debian layout when installing python modules
  	fi
  
  tests: version-update tests-man-autogen
+@@ -180,7 +180,7 @@ tests-install: tests
+ 	if [ "$(DESTDIR)" = "" ]; then \
+ 		cd ipatests; $(PYTHON) setup.py install; \
+ 	else \
+-		cd ipatests; $(PYTHON) setup.py install --root $(DESTDIR); \
++		cd ipatests; $(PYTHON) setup.py install --root $(DESTDIR) --install-layout=deb; \
+ 	fi
+ 	cd ipatests/man && $(MAKE) install
+ 
 --- a/ipapython/Makefile
 +++ b/ipapython/Makefile
 @@ -14,7 +14,7 @@ install: