diff --git a/fuzz/Cargo.toml b/fuzz/Cargo.toml
index 58fe07f50b..b84aabc5d2 100644
--- a/fuzz/Cargo.toml
+++ b/fuzz/Cargo.toml
@@ -21,3 +21,7 @@ members = ["."]
 [[bin]]
 name = "fuzz_regex_match"
 path = "fuzz_targets/fuzz_regex_match.rs"
+
+[profile.release]
+opt-level = 3
+debug = true
diff --git a/tests/regression_fuzz.rs b/tests/regression_fuzz.rs
new file mode 100644
index 0000000000..78885b91d4
--- /dev/null
+++ b/tests/regression_fuzz.rs
@@ -0,0 +1,12 @@
+// These tests are only run for the "default" test target because some of them
+// can take quite a long time. Some of them take long enough that it's not
+// practical to run them in debug mode. :-/
+
+// See: https://oss-fuzz.com/testcase-detail/5673225499181056
+//
+// Ignored by default since it takes too long in debug mode (almost a minute).
+#[test]
+#[ignore]
+fn fuzz1() {
+    regex!(r"1}{55}{0}*{1}{55}{55}{5}*{1}{55}+{56}|;**");
+}
diff --git a/tests/test_default.rs b/tests/test_default.rs
index c0979c10fc..241e5804ca 100644
--- a/tests/test_default.rs
+++ b/tests/test_default.rs
@@ -49,6 +49,7 @@ mod misc;
 mod multiline;
 mod noparse;
 mod regression;
+mod regression_fuzz;
 mod replace;
 mod searcher;
 mod set;