diff --git a/src/test/miner_tests.cpp b/src/test/miner_tests.cpp
--- a/src/test/miner_tests.cpp
+++ b/src/test/miner_tests.cpp
@@ -711,15 +711,6 @@
     // We are working on a fake chain and need to protect ourselves.
     LOCK(cs_main);
 
-    // Activate UAHF the dirty way
-    const int64_t uahfHeight =
-        config.GetChainParams().GetConsensus().uahfHeight;
-    auto pindex = chainActive.Tip();
-    for (size_t i = 0; pindex && i < 5; i++) {
-        pindex->nHeight = uahfHeight + 5 - i;
-        pindex = pindex->pprev;
-    }
-
     // Test around historical 1MB (plus one byte because that's mandatory)
     config.SetMaxBlockSize(ONE_MEGABYTE + 1);
     CheckBlockMaxSize(chainparams, 0, 1000);