diff --git a/research/fraginternals.py b/research/fraginternals.py
index 63d159ed6..15ac8c9c2 100644
--- a/research/fraginternals.py
+++ b/research/fraginternals.py
@@ -202,6 +202,7 @@ class Test(metaclass=abc.ABCMeta):
 	def __init__(self, actions=None):
 		self.actions = actions if actions != None else []
 		self.generated = False
+		self.pre_delay = None
 		self.delay = None
 		self.inc_pn = None
 		self.check_fn = None
@@ -268,7 +269,8 @@ class Test(metaclass=abc.ABCMeta):
 			return False
 		return self.check_fn(p)
 
-	def set_general_options(self, delay=None, inc_pn=None):
+	def set_general_options(self, delay=None, inc_pn=None, pre_delay=None):
+		self.pre_delay = pre_delay
 		self.delay = delay
 		self.inc_pn = inc_pn