diff --git a/src/bootstrap/src/core/build_steps/test.rs b/src/bootstrap/src/core/build_steps/test.rs
index 2c36d8bab828c..bdf110a25669b 100644
--- a/src/bootstrap/src/core/build_steps/test.rs
+++ b/src/bootstrap/src/core/build_steps/test.rs
@@ -3405,7 +3405,6 @@ impl Step for CodegenCranelift {
             // FIXME remove once vendoring is handled
             .arg("--skip-test")
             .arg("testsuite.extended_sysroot");
-        cargo.args(builder.config.test_args());
 
         cargo.into_cmd().run(builder);
     }
@@ -3600,12 +3599,8 @@ impl Step for TestFloatParse {
             &[],
         );
 
-        cargo_run.arg("--");
-        if builder.config.args().is_empty() {
-            // By default, exclude tests that take longer than ~1m.
-            cargo_run.arg("--skip-huge");
-        } else {
-            cargo_run.args(builder.config.args());
+        if !matches!(env::var("FLOAT_PARSE_TESTS_NO_SKIP_HUGE").as_deref(), Ok("1") | Ok("true")) {
+            cargo_run.args(["--", "--skip-huge"]);
         }
 
         cargo_run.into_cmd().run(builder);
diff --git a/src/ci/github-actions/jobs.yml b/src/ci/github-actions/jobs.yml
index 340dfd67b7dd7..82ba3f587e25c 100644
--- a/src/ci/github-actions/jobs.yml
+++ b/src/ci/github-actions/jobs.yml
@@ -48,7 +48,7 @@ runners:
 
 envs:
   env-x86_64-apple-tests: &env-x86_64-apple-tests
-    SCRIPT: ./x.py --stage 2 test --skip tests/ui --skip tests/rustdoc
+    SCRIPT: ./x.py --stage 2 test --skip tests/ui --skip tests/rustdoc -- --exact
     RUST_CONFIGURE_ARGS: --build=x86_64-apple-darwin --enable-sanitizers --enable-profiler --set rust.jemalloc
     RUSTC_RETRY_LINKER_ON_SEGFAULT: 1
     MACOSX_DEPLOYMENT_TARGET: 10.12