test: Do not update toolchain in exact output check

Signed-off-by: Daniel Silverstone <dsilvers@digital-scurf.org>

Author: kinnison

tests/cli-inst-interactive.rs

@@ -124,7 +124,11 @@ Rust is installed now. Great!
 fn blank_lines_around_stderr_log_output_update() {
     setup(&|config| {
         run_input(config, &["rustup-init"], "\n\n");
-        let out = run_input(config, &["rustup-init"], "\n\n");
+        let out = run_input(
+            config,
+            &["rustup-init", "--no-update-default-toolchain"],
+            "\n\n",
+        );
         println!("-- stdout --\n {}", out.stdout);
         println!("-- stderr --\n {}", out.stderr);
 

tests/cli-self-upd.rs

@@ -901,7 +901,7 @@ fn reinstall_exact() {
         expect_ok(config, &["rustup-init", "-y"]);
         expect_stderr_ok(
             config,
-            &["rustup-init", "-y"],
+            &["rustup-init", "-y", "--no-update-default-toolchain"],
             r"info: updating existing rustup installation - leaving toolchains alone",
         );
     });