diff --git a/c-uint256-tests/loop_proptest b/c-uint256-tests/loop_proptest
new file mode 100755
index 00000000..7939c484
--- /dev/null
+++ b/c-uint256-tests/loop_proptest
@@ -0,0 +1,11 @@
+#!/bin/bash
+
+export PROPTEST_CASES=100000
+
+counter=1
+while :
+do
+    echo "$counter round"
+    cargo test
+    ((counter++))
+done