|  | @@ -783,7 +783,7 @@ associated status messages end-to-end.
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				|  |  |  When the client sends metadata with the key `"x-grpc-test-echo-initial"` with its
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				|  |  |  request, the server sends back exactly this key and the corresponding value back to
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				|  |  |  the client as part of initial metadata. When the client sends metadata with the key
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				|  |  | -`"x-grpc-test-echo-trailing"` with its request, the server sends back exactly this
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				|  |  | +`"x-grpc-test-echo-trailing-bin"` with its request, the server sends back exactly this
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				|  |  |  key and the corresponding value back to the client as trailing metadata.
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				|  |  |  
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				|  |  |  ### Observe ResponseParameters.interval_us
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