|  | @@ -149,7 +149,8 @@ class GenericEnd2endTest : public ::testing::Test {
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				|  |  |        GenericServerContext srv_ctx;
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				|  |  |        GenericServerAsyncReaderWriter stream(&srv_ctx);
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				|  |  |  
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				|  |  | -      send_request.set_message("Hello");
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				|  |  | +      // The string needs to be long enough to test heap-based slice.
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				|  |  | +      send_request.set_message("Hello world. Hello world. Hello world.");
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				|  |  |        std::unique_ptr<GenericClientAsyncReaderWriter> call =
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				|  |  |            generic_stub_->Call(&cli_ctx, kMethodName, &cli_cq_, tag(1));
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				|  |  |        client_ok(1);
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