--- a/tests/run-tests
+++ b/tests/run-tests
@@ -14,6 +14,9 @@ export LC_TELEPHONE="C"
 export LC_MEASUREMENT="C"
 export LC_IDENTIFICATION="C"
 export LC_ALL=""
+export HGEDITOR=true
+export HGMERGE=true
+export HGUSER=test
 
 umask 022