Update interop-test-descriptions.md
diff --git a/doc/interop-test-descriptions.md b/doc/interop-test-descriptions.md
index 0839d0a..2609e7f 100644
--- a/doc/interop-test-descriptions.md
+++ b/doc/interop-test-descriptions.md
@@ -31,8 +31,8 @@
[ca.pem](https://github.com/grpc/grpc/blob/master/src/core/tsi/test_creds/ca.pem)
as the CA root
* --default_service_account=ACCOUNT_EMAIL
- * Email of the GCE default service account. Only applicable when running in
- GCE.
+ * Email of the GCE default service account. Only applicable
+ for compute_engine_creds test.
* --oauth_scope=SCOPE
* OAuth scope. For example, "https://www.googleapis.com/auth/xapi.zoo"
* --service_account_key_file=PATH
@@ -346,7 +346,7 @@
Asserts:
* call was successful
* received SimpleResponse.username is in the json key file read from
- ```--service_account_key_file```
+ ```--service_account_key_file```
* received SimpleResponse.oauth_scope is in ```--oauth_scope```
* response payload body is 314159 bytes in size
* clients are free to assert that the response payload body contents are zero
@@ -359,8 +359,9 @@
This test verifies unary calls succeed in sending messages while using JWT
token (created by the project's key file)
-Client sets flag ```--service_account_key_file``` with the path to json key
-file downloaded from https://console.developers.google.com.
+Test caller should set flag ```--service_account_key_file``` with the
+path to json key file downloaded from
+https://console.developers.google.com.
Server features:
* [UnaryCall][]