diff --git a/tests/fauxmplementations/envsonschema/Dockerfile b/tests/fauxmplementations/envsonschema/Dockerfile
index 7007781f7..7072c64f0 100644
--- a/tests/fauxmplementations/envsonschema/Dockerfile
+++ b/tests/fauxmplementations/envsonschema/Dockerfile
@@ -1,3 +1,3 @@
-FROM python:3.14.1-alpine
+FROM python:3.15.0a2-alpine
 COPY envsonschema /usr/local/bin
 CMD ["/usr/local/bin/envsonschema"]