test(build-std): expand assertion to ensure no index update

tests/build-std/main.rs

@@ -119,8 +119,31 @@ fn basic() {
 
 "#]])
         .run();
-    p.cargo("run").build_std().target_host().run();
-    p.cargo("test").build_std().target_host().run();
+    p.cargo("run")
+        .build_std()
+        .target_host()
+        .with_stderr_data(str![[r#"
+[FINISHED] `dev` profile [unoptimized + debuginfo] target(s) in [ELAPSED]s
+[RUNNING] `target/[HOST_TARGET]/debug/foo`
+
+"#]])
+        .run();
+    p.cargo("test")
+        .build_std()
+        .target_host()
+        .with_stderr_data(str![[r#"
+[COMPILING] rustc-std-workspace-std [..]
+...
+[COMPILING] test v0.0.0 ([..])
+[COMPILING] foo v0.0.1 ([ROOT]/foo)
+[FINISHED] `test` profile [unoptimized + debuginfo] target(s) in [ELAPSED]s
+[RUNNING] unittests src/lib.rs (target/[HOST_TARGET]/debug/deps/foo-[HASH])
+[RUNNING] unittests src/main.rs (target/[HOST_TARGET]/debug/deps/foo-[HASH])
+[RUNNING] tests/smoke.rs (target/[HOST_TARGET]/debug/deps/smoke-[HASH])
+[DOCTEST] foo
+
+"#]])
+        .run();
 
     // Check for hack that removes dylibs.
     let deps_dir = Path::new("target")