On Tue,  6 Feb 2018 17:13:12 -0800
Brandon Williams [off-list ref] wrote:

+test_expect_success 'push with http:// and a config of v2 does not request v2' '
+	# Till v2 for push is designed, make sure that if a client has
+	# protocol.version configured to use v2, that the client instead falls
+	# back and uses v0.
+
+	test_commit -C http_child three &&
+
+	# Push to another branch, as the target repository has the
+	# master branch checked out and we cannot push into it.
+	GIT_TRACE_PACKET=1 git -C http_child -c protocol.version=1 \
+		push origin HEAD:client_branch && 2>log &&

Should it be protocol.version=2? Also, two double ampersands?

Also, optionally, it might be better to do
GIT_TRACE_PACKET="$(pwd)/log", so that it does not get mixed with other
stderr output.