test: move SEQUENCE_LOCKTIME flags to script

diff --git a/test/functional/feature_bip68_sequence.py b/test/functional/feature_bip68_sequence.py
index 2f54183f..ac2d56fb 100755
--- a/test/functional/feature_bip68_sequence.py
+++ b/test/functional/feature_bip68_sequence.py
@@ -24,6 +24,10 @@ from test_framework.messages import (
 from test_framework.script import (
     CScript,
     OP_TRUE,
+    SEQUENCE_LOCKTIME_DISABLE_FLAG,
+    SEQUENCE_LOCKTIME_TYPE_FLAG,
+    SEQUENCE_LOCKTIME_GRANULARITY,
+    SEQUENCE_LOCKTIME_MASK,
 )
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import (
@@ -36,11 +40,6 @@ from test_framework.wallet import MiniWallet
 
 SCRIPT_W0_SH_OP_TRUE = script_to_p2wsh_script(CScript([OP_TRUE]))
 
-SEQUENCE_LOCKTIME_DISABLE_FLAG = (1<<31)
-SEQUENCE_LOCKTIME_TYPE_FLAG = (1<<22) # this means use time (0 means height)
-SEQUENCE_LOCKTIME_GRANULARITY = 9 # this is a bit-shift
-SEQUENCE_LOCKTIME_MASK = 0x0000ffff
-
 # RPC error for non-BIP68 final transactions
 NOT_FINAL_ERROR = "non-BIP68-final"
 
diff --git a/test/functional/test_framework/script.py b/test/functional/test_framework/script.py
index 369bd2d7..9386064f 100644
--- a/test/functional/test_framework/script.py
+++ b/test/functional/test_framework/script.py
@@ -28,6 +28,11 @@ MAX_PUBKEYS_PER_MULTI_A = 999
 LOCKTIME_THRESHOLD = 500000000
 ANNEX_TAG = 0x50
 
+SEQUENCE_LOCKTIME_DISABLE_FLAG = (1<<31)
+SEQUENCE_LOCKTIME_TYPE_FLAG = (1<<22) # this means use time (0 means height)
+SEQUENCE_LOCKTIME_GRANULARITY = 9 # this is a bit-shift
+SEQUENCE_LOCKTIME_MASK = 0x0000ffff
+
 LEAF_VERSION_TAPSCRIPT = 0xc0
 
 def hash160(s):