--- a/tests/test-pull-http.t Wed Apr 11 14:39:49 2018 -0400
+++ b/tests/test-pull-http.t Wed Apr 11 14:57:11 2018 -0400
@@ -1,5 +1,16 @@
#require killdaemons
+#if no-windows
+For debugging: this is a pretty simple test that is a good candidate
+for tracking down network-related bugs. Sometimes a command in this
+hangs, so having showstack pre-loaded is sometimes helpful. This also
+gives us a test that at least proves showstack can be loaded.
+ $ cat >> $HGRCPATH <<EOF
+ > [extensions]
+ > showstack = $TESTDIR/../contrib/showstack.py
+ > EOF
+#endif
+
$ hg init test
$ cd test
$ echo a > a