diff --git a/x-pack/test/apm_api_integration/basic/tests/transaction_groups/error_rate.ts b/x-pack/test/apm_api_integration/basic/tests/transaction_groups/error_rate.ts
index 831e084f5ce2c..cf23883612b7c 100644
--- a/x-pack/test/apm_api_integration/basic/tests/transaction_groups/error_rate.ts
+++ b/x-pack/test/apm_api_integration/basic/tests/transaction_groups/error_rate.ts
@@ -48,15 +48,15 @@ export default function ApiTest({ getService }: FtrProviderContext) {
         });
 
         it('has the correct start date', () => {
-          expectSnapshot(first(errorRateResponse.erroneousTransactionsRate)?.x).toMatchInline(
-            `1598439600000`
-          );
+          expectSnapshot(
+            new Date(first(errorRateResponse.erroneousTransactionsRate)?.x ?? NaN).toISOString()
+          ).toMatchInline(`"2020-08-26T11:00:00.000Z"`);
         });
 
         it('has the correct end date', () => {
-          expectSnapshot(last(errorRateResponse.erroneousTransactionsRate)?.x).toMatchInline(
-            `1598441400000`
-          );
+          expectSnapshot(
+            new Date(last(errorRateResponse.erroneousTransactionsRate)?.x ?? NaN).toISOString()
+          ).toMatchInline(`"2020-08-26T11:30:00.000Z"`);
         });
 
         it('has the correct number of buckets', () => {