diff --git a/src/chainparams.cpp b/src/chainparams.cpp
index 8a121c9eb6..43f1b9fc68 100644
--- a/src/chainparams.cpp
+++ b/src/chainparams.cpp
@@ -477,7 +477,7 @@ class CTestNetParams : public CChainParams {
 
         // Deployment of Deployment of Basic BLS, AssetLocks, EHF
         consensus.vDeployments[Consensus::DEPLOYMENT_V19].bit = 8;
-        consensus.vDeployments[Consensus::DEPLOYMENT_V19].nStartTime = 1678838400;     // Wed, March 15, 2023 0:00:00
+        consensus.vDeployments[Consensus::DEPLOYMENT_V19].nStartTime = 999999999999ULL;     // Wed, March 15, 2023 0:00:00
         consensus.vDeployments[Consensus::DEPLOYMENT_V19].nTimeout = 999999999999ULL;
         consensus.vDeployments[Consensus::DEPLOYMENT_V19].nWindowSize = 100;
         consensus.vDeployments[Consensus::DEPLOYMENT_V19].nThresholdStart = 80;         // 80% of 100