diff --git a/polars/Makefile b/polars/Makefile
index 72b7ccf07353..b361135c06a1 100644
--- a/polars/Makefile
+++ b/polars/Makefile
@@ -34,7 +34,7 @@ miri:
 	# not tested on all features because miri does not support SIMD
 	# some tests are also filtered, because miri cannot deal with the rayon threadpool
 	# Miri also reports UB in prettytable.rs, so we must toggle that feature off.
-	MIRIFLAGS="-Zmiri-disable-isolation" \
+	MIRIFLAGS="-Zmiri-disable-isolation -Zmiri-ignore-leaks" \
 	POLARS_ALLOW_EXTENSION=1 \
 	cargo miri test \
 	    --no-default-features \
diff --git a/polars/polars-core/src/testing.rs b/polars/polars-core/src/testing.rs
index ffb1df5f55a2..ca19ed5e0a75 100644
--- a/polars/polars-core/src/testing.rs
+++ b/polars/polars-core/src/testing.rs
@@ -199,4 +199,18 @@ mod test {
         assert_eq!(df3, df3);
         assert_ne!(df4, df4);
     }
+
+    //-----RAYON LEAK PROOF-----
+    #[test]
+    fn test_miri_rayonthread_leak1() {
+        crate::POOL.install(|| ());
+    }
+
+    #[test]
+    fn test_miri_rayonthread_leak2() {
+        use rayon::prelude::*;
+        let tmp: Vec<i32> = [1, 2].par_iter().map(|x| x * x).collect();
+        assert_eq!(tmp, &[1, 4]);
+    }
+    //--------------
 }