diff --git a/x-pack/plugins/observability/public/components/custom_threshold/custom_threshold_rule_expression.test.tsx b/x-pack/plugins/observability/public/components/custom_threshold/custom_threshold_rule_expression.test.tsx
index 0604f1f90a6725..a97de99ec8e786 100644
--- a/x-pack/plugins/observability/public/components/custom_threshold/custom_threshold_rule_expression.test.tsx
+++ b/x-pack/plugins/observability/public/components/custom_threshold/custom_threshold_rule_expression.test.tsx
@@ -179,6 +179,8 @@ describe('Expression', () => {
             { name: 'B', aggType: Aggregators.CARDINALITY, field: 'system.cpu.user.pct' },
           ],
           comparator: Comparator.LT_OR_EQ,
+          equation: 'A * B',
+          label: 'prefill label',
           threshold: [500],
           timeSize: 7,
           timeUnit: 'h',
@@ -199,6 +201,8 @@ describe('Expression', () => {
           { name: 'B', aggType: Aggregators.CARDINALITY, field: 'system.cpu.user.pct' },
         ],
         comparator: Comparator.LT_OR_EQ,
+        equation: 'A * B',
+        label: 'prefill label',
         threshold: [500],
         timeSize: 7,
         timeUnit: 'h',