diff --git a/.travis.yml b/.travis.yml
index 701a853..9c9647a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,4 +2,5 @@ language: go
 go:
 - 1.11.1
 script:
+- ./script/lint
 - go test -v ./...
diff --git a/script/lint b/script/lint
new file mode 100755
index 0000000..0dce6cc
--- /dev/null
+++ b/script/lint
@@ -0,0 +1,5 @@
+#!/bin/bash -ex
+
+# Ensure the repository is clean after code generation.
+./script/generate
+test -z "$(git status --porcelain)"