diff --git a/python/tox.ini b/python/tox.ini
index 74cc1c554..eaa444646 100644
--- a/python/tox.ini
+++ b/python/tox.ini
@@ -10,6 +10,9 @@ envlist =
 commands = 
     pytest -n6 --extra-info --reruns 2 --reruns-delay 5 -v -rsXx --ignored --strict-tls {posargs: tests examples}
     pip wheel . -w {toxworkdir}/wheelhouse --no-deps
+setenv =
+# Avoid stack overflow when Rust core is built without optimizations.
+    RUST_MIN_STACK=8388608
 passenv = 
     DCC_RS_DEV
     DCC_RS_TARGET