diff --git a/askpass_git.sh b/askpass_git.sh
index 5a33a7c..8558362 100755
--- a/askpass_git.sh
+++ b/askpass_git.sh
@@ -17,10 +17,12 @@ fi
 # `git credential fill` requires the repo url match to consume the credentials stored by git-sync.
 # Askpass git only support repo started with "file://" which is used in test_e2e.sh.
 REPO=$(echo "$@" | grep -o "file://[^ ]*")
-PASSWD=$(echo "url=${REPO}" | git credential fill | grep -o "password=.*")
-# Test case much match the magic password below.
-if [ "${PASSWD}" != "password=Lov3!k0os" ]; then
-  echo "invalid password ${PASSWD}, try Lov3!k0os next time."
+OUTPUT=$(echo "url=${REPO}" | git credential fill)
+USERNAME=$(echo ${OUTPUT} | grep -o "username=.*")
+PASSWD=$(echo ${OUTPUT} | grep -o "password=.*")
+# Test case must match the magic username and password below.
+if [ "${PASSWD}" != "password=Lov3!k0os" || "${USERNAME}" != "gitsync@example.com" ]; then
+  echo "invalid username/password pair: ${USERNAME}:${PASSWD}, try gitsync@example.com:Lov3!k0os next time."
   exit 1
 fi
 
diff --git a/test_e2e.sh b/test_e2e.sh
index c39e4c9..6178115 100755
--- a/test_e2e.sh
+++ b/test_e2e.sh
@@ -641,7 +641,7 @@ git -C "$REPO" commit -qam "$TESTCASE 1"
 # run with askpass_git but with wrong password
 GIT_SYNC \
     --git=$ASKPASS_GIT \
-    --username="you@example.com" \
+    --username="gitsync@example.com" \
     --password="I have no idea what the password is." \
     --logtostderr \
     --v=5 \
@@ -657,7 +657,7 @@ assert_file_absent "$ROOT"/link/file
 # run with askpass_git with correct password
 GIT_SYNC \
     --git=$ASKPASS_GIT \
-    --username="you@example.com" \
+    --username="gitsync@example.com" \
     --password="Lov3!k0os" \
     --logtostderr \
     --v=5 \