diff --git a/src/chainparams.cpp b/src/chainparams.cpp
index 4ce1b5388..d33423322 100644
--- a/src/chainparams.cpp
+++ b/src/chainparams.cpp
@@ -272,10 +272,10 @@ public:
         strNetworkID = "regtest";
         consensus.nSubsidyHalvingInterval = 150;
         consensus.BIP16Exception = uint256();
-        consensus.BIP34Height = 100000000; // BIP34 has not activated on regtest (far in the future so block v1 are not rejected in tests)
+        consensus.BIP34Height = 500; // BIP34 activated on regtest (Used in functional tests)
         consensus.BIP34Hash = uint256();
-        consensus.BIP65Height = 1351; // BIP65 activated on regtest (Used in rpc activation tests)
-        consensus.BIP66Height = 1251; // BIP66 activated on regtest (Used in rpc activation tests)
+        consensus.BIP65Height = 1351; // BIP65 activated on regtest (Used in functional tests)
+        consensus.BIP66Height = 1251; // BIP66 activated on regtest (Used in functional tests)
         consensus.powLimit = uint256S("7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff");
         consensus.nPowTargetTimespan = 14 * 24 * 60 * 60; // two weeks
         consensus.nPowTargetSpacing = 10 * 60;
diff --git a/test/functional/feature_block.py b/test/functional/feature_block.py
index 244cde044..5253ff7aa 100755
--- a/test/functional/feature_block.py
+++ b/test/functional/feature_block.py
@@ -925,7 +925,7 @@ class FullBlockTest(BitcoinTestFramework):
         #                                                                                    \-> b67 (20)
         #
         #
-        self.log.info("Reject a block with a transaction double spending a transaction creted in the same block")
+        self.log.info("Reject a block with a transaction double spending a transaction created in the same block")
         self.move_tip(65)
         b67 = self.next_block(67)
         tx1 = self.create_and_sign_transaction(out[20], out[20].vout[0].nValue)
@@ -1220,7 +1220,7 @@ class FullBlockTest(BitcoinTestFramework):
         blocks = []
         spend = out[32]
         for i in range(89, LARGE_REORG_SIZE + 89):
-            b = self.next_block(i, spend)
+            b = self.next_block(i, spend, version=4)
             tx = CTransaction()
             script_length = MAX_BLOCK_BASE_SIZE - len(b.serialize()) - 69
             script_output = CScript([b'\x00' * script_length])
@@ -1239,20 +1239,32 @@ class FullBlockTest(BitcoinTestFramework):
         self.move_tip(88)
         blocks2 = []
         for i in range(89, LARGE_REORG_SIZE + 89):
-            blocks2.append(self.next_block("alt" + str(i)))
+            blocks2.append(self.next_block("alt" + str(i), version=4))
         self.sync_blocks(blocks2, False, force_send=True)
 
         # extend alt chain to trigger re-org
-        block = self.next_block("alt" + str(chain1_tip + 1))
+        block = self.next_block("alt" + str(chain1_tip + 1), version=4)
         self.sync_blocks([block], True, timeout=480)
 
         # ... and re-org back to the first chain
         self.move_tip(chain1_tip)
-        block = self.next_block(chain1_tip + 1)
+        block = self.next_block(chain1_tip + 1, version=4)
         self.sync_blocks([block], False, force_send=True)
-        block = self.next_block(chain1_tip + 2)
+        block = self.next_block(chain1_tip + 2, version=4)
         self.sync_blocks([block], True, timeout=480)
 
+        self.log.info("Reject a block with an invalid block header version")
+        b_v1 = self.next_block('b_v1', version=1)
+        self.sync_blocks([b_v1], success=False, force_send=True, reject_reason='bad-version(0x00000001)')
+
+        self.move_tip(chain1_tip + 2)
+        b_cb34 = self.next_block('b_cb34', version=4)
+        b_cb34.vtx[0].vin[0].scriptSig = b_cb34.vtx[0].vin[0].scriptSig[:-1]
+        b_cb34.vtx[0].rehash()
+        b_cb34.hashMerkleRoot = b_cb34.calc_merkle_root()
+        b_cb34.solve()
+        self.sync_blocks([b_cb34], success=False, reject_reason='bad-cb-height', reconnect=True)
+
     # Helper methods
     ################
 
@@ -1280,7 +1292,7 @@ class FullBlockTest(BitcoinTestFramework):
         tx.rehash()
         return tx
 
-    def next_block(self, number, spend=None, additional_coinbase_value=0, script=CScript([OP_TRUE]), solve=True):
+    def next_block(self, number, spend=None, additional_coinbase_value=0, script=CScript([OP_TRUE]), solve=True, *, version=1):
         if self.tip is None:
             base_block_hash = self.genesis_hash
             block_time = int(time.time()) + 1
@@ -1293,11 +1305,11 @@ class FullBlockTest(BitcoinTestFramework):
         coinbase.vout[0].nValue += additional_coinbase_value
         coinbase.rehash()
         if spend is None:
-            block = create_block(base_block_hash, coinbase, block_time)
+            block = create_block(base_block_hash, coinbase, block_time, version=version)
         else:
             coinbase.vout[0].nValue += spend.vout[0].nValue - 1  # all but one satoshi to fees
             coinbase.rehash()
-            block = create_block(base_block_hash, coinbase, block_time)
+            block = create_block(base_block_hash, coinbase, block_time, version=version)
             tx = self.create_tx(spend, 0, 1, script)  # spend 1 satoshi
             self.sign_tx(tx, spend)
             self.add_transactions_to_block(block, [tx])
diff --git a/test/functional/test_framework/blocktools.py b/test/functional/test_framework/blocktools.py
index 7679ea539..6b47cae4c 100644
--- a/test/functional/test_framework/blocktools.py
+++ b/test/functional/test_framework/blocktools.py
@@ -46,9 +46,10 @@ MAX_BLOCK_SIGOPS = 20000
 # From BIP141
 WITNESS_COMMITMENT_HEADER = b"\xaa\x21\xa9\xed"
 
-def create_block(hashprev, coinbase, ntime=None):
+def create_block(hashprev, coinbase, ntime=None, *, version=1):
     """Create a block (with regtest difficulty)."""
     block = CBlock()
+    block.nVersion = version
     if ntime is None:
         import time
         block.nTime = int(time.time() + 600)