diff --git a/deltachat-rpc-client/tox.ini b/deltachat-rpc-client/tox.ini
index 86962e798..2543d5108 100644
--- a/deltachat-rpc-client/tox.ini
+++ b/deltachat-rpc-client/tox.ini
@@ -6,7 +6,7 @@ envlist =
 
 [testenv]
 commands =
-    pytest {posargs}
+    pytest --exitfirst {posargs}
 setenv =
 # Avoid stack overflow when Rust core is built without optimizations.
     RUST_MIN_STACK=8388608
diff --git a/python/tox.ini b/python/tox.ini
index f22c5252a..904dd041b 100644
--- a/python/tox.ini
+++ b/python/tox.ini
@@ -8,7 +8,7 @@ envlist =
 
 [testenv]
 commands = 
-    pytest -n6 --extra-info -v -rsXx --ignored --strict-tls {posargs: tests examples}
+    pytest -n6 --exitfirst --extra-info -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.