diff --git a/provisioner/terraform/testdata/generate.sh b/provisioner/terraform/testdata/generate.sh
index ae6718dce2..03e2e0507a 100755
--- a/provisioner/terraform/testdata/generate.sh
+++ b/provisioner/terraform/testdata/generate.sh
@@ -78,6 +78,9 @@ run() {
 	toskip=(
 		# This needs care to update correctly.
 		"kubernetes-metadata"
+		# Multiple resources with duplicate JSON key names (id, agent_id)
+		# cause minimize_diff() to scramble UUIDs. Hand-crafted fixture.
+		"duplicate-env-keys"
 	)
 	for skip in "${toskip[@]}"; do
 		if [[ $name == "$skip" ]]; then