diff --git a/crates/libtest-lexarg/src/lib.rs b/crates/libtest-lexarg/src/lib.rs
index aeffd1e..3a402e4 100644
--- a/crates/libtest-lexarg/src/lib.rs
+++ b/crates/libtest-lexarg/src/lib.rs
@@ -108,6 +108,7 @@ Options:
         --ignored       Run only ignored tests
         --include-ignored 
                         Run ignored and not ignored tests
+        --fail-fast     Don't start new tests after the first failure
         --no-capture    don't capture stdout/stderr of each task, allow
                         printing directly
         --show-output   Show captured stdout of successful tests
@@ -221,6 +222,9 @@ impl TestOptsBuilder {
             Long("exact") => {
                 self.opts.filter_exact = true;
             }
+            Long("fail-fast") => {
+                self.opts.fail_fast = true;
+            }
             Long("color") => {
                 let color = parser
                     .next_flag_value()
diff --git a/crates/libtest2-mimic/tests/testsuite/mixed_bag.rs b/crates/libtest2-mimic/tests/testsuite/mixed_bag.rs
index ffce1f1..dc74494 100644
--- a/crates/libtest2-mimic/tests/testsuite/mixed_bag.rs
+++ b/crates/libtest2-mimic/tests/testsuite/mixed_bag.rs
@@ -1012,6 +1012,146 @@ failures:
 test result: FAILED. 2 passed; 1 failed; 5 ignored; 0 filtered out; finished in [..]s
 
 
+"#]],
+    );
+}
+
+#[test]
+fn fail_fast() {
+    check(
+        &["--fail-fast"],
+        101,
+        str![[r#"
+
+running 8 tests
+test bear  ... ignored
+test bunny ... ignored
+test cat   ... ok
+test dog   ... FAILED
+
+failures:
+
+---- dog ----
+was not a good boy
+
+
+failures:
+    dog
+
+test result: FAILED. 1 passed; 1 failed; 2 ignored; 0 filtered out; finished in [..]s
+
+
+"#]],
+        str![[r#"
+...
+
+"#]],
+    );
+}
+
+#[test]
+#[cfg(feature = "json")]
+fn fail_fast_json() {
+    check(
+        &["-Zunstable-options", "--format=json", "--fail-fast"],
+        101,
+        str![[r#"
+[
+  {
+    "event": "discover_start"
+  },
+  {
+    "event": "discover_case",
+    "name": "bear"
+  },
+  {
+    "event": "discover_case",
+    "name": "bunny"
+  },
+  {
+    "event": "discover_case",
+    "name": "cat"
+  },
+  {
+    "event": "discover_case",
+    "name": "dog"
+  },
+  {
+    "event": "discover_case",
+    "name": "fly"
+  },
+  {
+    "event": "discover_case",
+    "name": "fox"
+  },
+  {
+    "event": "discover_case",
+    "name": "frog"
+  },
+  {
+    "event": "discover_case",
+    "name": "owl"
+  },
+  {
+    "elapsed_s": "[..]",
+    "event": "discover_complete"
+  },
+  {
+    "event": "suite_start"
+  },
+  {
+    "event": "case_start",
+    "name": "bear"
+  },
+  {
+    "elapsed_s": "[..]",
+    "event": "case_complete",
+    "message": "fails",
+    "name": "bear",
+    "status": "ignored"
+  },
+  {
+    "event": "case_start",
+    "name": "bunny"
+  },
+  {
+    "elapsed_s": "[..]",
+    "event": "case_complete",
+    "message": "fails",
+    "name": "bunny",
+    "status": "ignored"
+  },
+  {
+    "event": "case_start",
+    "name": "cat"
+  },
+  {
+    "elapsed_s": "[..]",
+    "event": "case_complete",
+    "name": "cat"
+  },
+  {
+    "event": "case_start",
+    "name": "dog"
+  },
+  {
+    "elapsed_s": "[..]",
+    "event": "case_complete",
+    "message": "was not a good boy",
+    "name": "dog",
+    "status": "failed"
+  },
+  {
+    "elapsed_s": "[..]",
+    "event": "suite_complete"
+  }
+]
+"#]]
+        .is_json()
+        .against_jsonlines(),
+        str![[r#"
+...
+
 "#]],
     );
 }
diff --git a/crates/libtest2/tests/testsuite/mixed_bag.rs b/crates/libtest2/tests/testsuite/mixed_bag.rs
index 89e8c17..2f9cf64 100644
--- a/crates/libtest2/tests/testsuite/mixed_bag.rs
+++ b/crates/libtest2/tests/testsuite/mixed_bag.rs
@@ -1019,6 +1019,146 @@ failures:
 test result: FAILED. 2 passed; 1 failed; 5 ignored; 0 filtered out; finished in [..]s
 
 
+"#]],
+    );
+}
+
+#[test]
+fn fail_fast() {
+    check(
+        &["--fail-fast"],
+        101,
+        str![[r#"
+
+running 8 tests
+test bear  ... ignored
+test bunny ... ignored
+test cat   ... ok
+test dog   ... FAILED
+
+failures:
+
+---- dog ----
+was not a good boy
+
+
+failures:
+    dog
+
+test result: FAILED. 1 passed; 1 failed; 2 ignored; 0 filtered out; finished in [..]s
+
+
+"#]],
+        str![[r#"
+...
+
+"#]],
+    );
+}
+
+#[test]
+#[cfg(feature = "json")]
+fn fail_fast_json() {
+    check(
+        &["-Zunstable-options", "--format=json", "--fail-fast"],
+        101,
+        str![[r#"
+[
+  {
+    "event": "discover_start"
+  },
+  {
+    "event": "discover_case",
+    "name": "bear"
+  },
+  {
+    "event": "discover_case",
+    "name": "bunny"
+  },
+  {
+    "event": "discover_case",
+    "name": "cat"
+  },
+  {
+    "event": "discover_case",
+    "name": "dog"
+  },
+  {
+    "event": "discover_case",
+    "name": "fly"
+  },
+  {
+    "event": "discover_case",
+    "name": "fox"
+  },
+  {
+    "event": "discover_case",
+    "name": "frog"
+  },
+  {
+    "event": "discover_case",
+    "name": "owl"
+  },
+  {
+    "elapsed_s": "[..]",
+    "event": "discover_complete"
+  },
+  {
+    "event": "suite_start"
+  },
+  {
+    "event": "case_start",
+    "name": "bear"
+  },
+  {
+    "elapsed_s": "[..]",
+    "event": "case_complete",
+    "message": "fails",
+    "name": "bear",
+    "status": "ignored"
+  },
+  {
+    "event": "case_start",
+    "name": "bunny"
+  },
+  {
+    "elapsed_s": "[..]",
+    "event": "case_complete",
+    "message": "fails",
+    "name": "bunny",
+    "status": "ignored"
+  },
+  {
+    "event": "case_start",
+    "name": "cat"
+  },
+  {
+    "elapsed_s": "[..]",
+    "event": "case_complete",
+    "name": "cat"
+  },
+  {
+    "event": "case_start",
+    "name": "dog"
+  },
+  {
+    "elapsed_s": "[..]",
+    "event": "case_complete",
+    "message": "was not a good boy",
+    "name": "dog",
+    "status": "failed"
+  },
+  {
+    "elapsed_s": "[..]",
+    "event": "suite_complete"
+  }
+]
+"#]]
+        .is_json()
+        .against_jsonlines(),
+        str![[r#"
+...
+
 "#]],
     );
 }