diff --git a/tests/common/mod.rs b/tests/common/mod.rs
index d6fdc7d6d..f29d800c7 100644
--- a/tests/common/mod.rs
+++ b/tests/common/mod.rs
@@ -19,7 +19,7 @@ pub fn abort_after() -> usize {
 pub fn rayon_init() {
     let stack_size = match env::var("RUST_MIN_STACK") {
         Ok(s) => s.parse().expect("failed to parse RUST_MIN_STACK"),
-        Err(_) => 20 * 1024 * 1024,
+        Err(_) => 1024 * 1024 * if cfg!(debug_assertions) { 40 } else { 20 },
     };
     ThreadPoolBuilder::new()
         .stack_size(stack_size)