diff --git a/Cargo.lock b/Cargo.lock
index 74f96983b31..24054e8592e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -5332,6 +5332,7 @@ version = "0.0.0"
 dependencies = [
  "core",
  "getopts",
+ "libc",
  "panic_abort",
  "panic_unwind",
  "std",
diff --git a/library/test/Cargo.toml b/library/test/Cargo.toml
index 92c535501bf..4c42e3bae56 100644
--- a/library/test/Cargo.toml
+++ b/library/test/Cargo.toml
@@ -9,3 +9,4 @@ std = { path = "../std" }
 core = { path = "../core" }
 panic_unwind = { path = "../panic_unwind" }
 panic_abort = { path = "../panic_abort" }
+libc = { version = "0.2.150", default-features = false }
diff --git a/library/test/src/helpers/exit_code.rs b/library/test/src/helpers/exit_code.rs
deleted file mode 100644
index f762f88819d..00000000000
--- a/library/test/src/helpers/exit_code.rs
+++ /dev/null
@@ -1,20 +0,0 @@
-//! Helper module to detect subprocess exit code.
-
-use std::process::ExitStatus;
-
-#[cfg(not(unix))]
-pub fn get_exit_code(status: ExitStatus) -> Result<i32, String> {
-    status.code().ok_or_else(|| "received no exit code from child process".into())
-}
-
-#[cfg(unix)]
-pub fn get_exit_code(status: ExitStatus) -> Result<i32, String> {
-    use std::os::unix::process::ExitStatusExt;
-    match status.code() {
-        Some(code) => Ok(code),
-        None => match status.signal() {
-            Some(signal) => Err(format!("child process exited with signal {signal}")),
-            None => Err("child process exited with unknown signal".into()),
-        },
-    }
-}
diff --git a/library/test/src/helpers/mod.rs b/library/test/src/helpers/mod.rs
index 6f366a911e8..3c79b90b167 100644
--- a/library/test/src/helpers/mod.rs
+++ b/library/test/src/helpers/mod.rs
@@ -2,6 +2,5 @@
 //! but used in `libtest`.
 
 pub mod concurrency;
-pub mod exit_code;
 pub mod metrics;
 pub mod shuffle;
diff --git a/library/test/src/lib.rs b/library/test/src/lib.rs
index 5969d6b772c..da110f99248 100644
--- a/library/test/src/lib.rs
+++ b/library/test/src/lib.rs
@@ -85,7 +85,6 @@ pub mod test {
 use core::any::Any;
 use event::{CompletedTest, TestEvent};
 use helpers::concurrency::get_concurrency;
-use helpers::exit_code::get_exit_code;
 use helpers::shuffle::{get_shuffle_seed, shuffle_tests};
 use options::RunStrategy;
 use test_result::*;
@@ -712,17 +711,7 @@ fn spawn_test_subprocess(
         formatters::write_stderr_delimiter(&mut test_output, &desc.name);
         test_output.extend_from_slice(&stderr);
 
-        let result = match (|| -> Result<TestResult, String> {
-            let exit_code = get_exit_code(status)?;
-            Ok(get_result_from_exit_code(&desc, exit_code, &time_opts, &exec_time))
-        })() {
-            Ok(r) => r,
-            Err(e) => {
-                write!(&mut test_output, "Unexpected error: {e}").unwrap();
-                TrFailed
-            }
-        };
-
+        let result = get_result_from_exit_code(&desc, status, &time_opts, &exec_time);
         (result, test_output, exec_time)
     })();
 
@@ -751,7 +740,7 @@ fn run_test_in_spawned_subprocess(desc: TestDesc, runnable_test: RunnableTest) -
         if let TrOk = test_result {
             process::exit(test_result::TR_OK);
         } else {
-            process::exit(test_result::TR_FAILED);
+            process::abort();
         }
     });
     let record_result2 = record_result.clone();
diff --git a/library/test/src/test_result.rs b/library/test/src/test_result.rs
index 1da238e3e8c..bb32c70d663 100644
--- a/library/test/src/test_result.rs
+++ b/library/test/src/test_result.rs
@@ -1,4 +1,8 @@
 use std::any::Any;
+use std::process::ExitStatus;
+
+#[cfg(unix)]
+use std::os::unix::process::ExitStatusExt;
 
 use super::bench::BenchSamples;
 use super::options::ShouldPanic;
@@ -7,11 +11,15 @@
 
 pub use self::TestResult::*;
 
-// Return codes for secondary process.
+// Return code for secondary process.
 // Start somewhere other than 0 so we know the return code means what we think
 // it means.
 pub const TR_OK: i32 = 50;
-pub const TR_FAILED: i32 = 51;
+
+// On Windows we use __fastfail to abort, which is documented to use this
+// exception code.
+#[cfg(windows)]
+const STATUS_ABORTED: i32 = 0xC0000409u32 as i32;
 
 #[derive(Debug, Clone, PartialEq)]
 pub enum TestResult {
@@ -81,14 +89,28 @@ pub fn calc_result<'a>(
 /// Creates a `TestResult` depending on the exit code of test subprocess.
 pub fn get_result_from_exit_code(
     desc: &TestDesc,
-    code: i32,
+    status: ExitStatus,
     time_opts: &Option<time::TestTimeOptions>,
     exec_time: &Option<time::TestExecTime>,
 ) -> TestResult {
-    let result = match code {
-        TR_OK => TestResult::TrOk,
-        TR_FAILED => TestResult::TrFailed,
-        _ => TestResult::TrFailedMsg(format!("got unexpected return code {code}")),
+    let result = match status.code() {
+        Some(TR_OK) => TestResult::TrOk,
+        #[cfg(windows)]
+        Some(STATUS_ABORTED) => TestResult::TrFailed,
+        #[cfg(unix)]
+        None => match status.signal() {
+            Some(libc::SIGABRT) => TestResult::TrFailed,
+            Some(signal) => {
+                TestResult::TrFailedMsg(format!("child process exited with signal {signal}"))
+            }
+            None => unreachable!("status.code() returned None but status.signal() was None"),
+        },
+        #[cfg(not(unix))]
+        None => TestResult::TrFailedMsg(format!("unknown return code")),
+        #[cfg(any(windows, unix))]
+        Some(code) => TestResult::TrFailedMsg(format!("got unexpected return code {code}")),
+        #[cfg(not(any(windows, unix)))]
+        Some(_) => TestResult::TrFailed,
     };
 
     // If test is already failed (or allowed to fail), do not change the result.