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-rw-r--r--doc/interop-test-descriptions.md6
1 files changed, 5 insertions, 1 deletions
diff --git a/doc/interop-test-descriptions.md b/doc/interop-test-descriptions.md
index 61b611129f..8649213bc6 100644
--- a/doc/interop-test-descriptions.md
+++ b/doc/interop-test-descriptions.md
@@ -600,7 +600,7 @@ json key file or GCE default service account email.
Similar to the other auth tests, this test is only for cloud-to-prod path.
-This test verifies unary calls succeed in sending messages using a JWT
+This test verifies unary calls succeed in sending messages using a JWT or a service account
credentials set on the RPC.
The test
@@ -608,6 +608,10 @@ The test
downloaded from https://console.developers.google.com. Alternately, if using a
usable auth implementation, it may specify the file location in the environment
variable GOOGLE_APPLICATION_CREDENTIALS
+- optionally uses the flag `--oauth_scope` for the oauth scope if implementator
+wishes to use service account credential instead of JWT credential. For testing
+against grpc-test.sandbox.google.com, oauth scope
+"https://www.googleapis.com/auth/xapi.zoo" should be used.
Server features:
* [UnaryCall][]