diff --git a/packages/sdk38/src/testutils.spec.ts b/packages/sdk38/src/testutils.spec.ts
index 005fdc26..b6c80a73 100644
--- a/packages/sdk38/src/testutils.spec.ts
+++ b/packages/sdk38/src/testutils.spec.ts
@@ -17,6 +17,7 @@ export const tendermintIdMatcher = /^[0-9A-F]{64}$/;
 export const tendermintOptionalIdMatcher = /^([0-9A-F]{64}|)$/;
 export const tendermintAddressMatcher = /^[0-9A-F]{40}$/;
 export const tendermintShortHashMatcher = /^[0-9a-f]{40}$/;
+export const dateTimeStampMatcher = /^[0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}(?:\.[0-9]+)?Z$/;
 export const semverMatcher = /^[0-9]+\.[0-9]+\.[0-9]+(-[0-9A-Za-z-]+(\.[0-9A-Za-z-]+)*)?$/;
 
 // https://github.com/bitcoin/bips/blob/master/bip-0173.mediawiki#bech32