diff --git a/.changeset/good-lobsters-search.md b/.changeset/good-lobsters-search.md
new file mode 100644
index 0000000..8d8bcc3
--- /dev/null
+++ b/.changeset/good-lobsters-search.md
@@ -0,0 +1,5 @@
+---
+"@swc/jest": patch
+---
+
+Return es2018 in the event that process.version is undefined.