diff --git a/research/fragattack.py b/research/fragattack.py
index 7063dde88..eab9c83b4 100755
--- a/research/fragattack.py
+++ b/research/fragattack.py
@@ -132,7 +132,7 @@ def prepare_tests(opt):
 	else: return None
 
 	# If requested, override delay and inc_pn parameters in the test.
-	test.set_general_options(opt.delay, opt.inc_pn)
+	test.set_general_options(opt.delay, opt.inc_pn, opt.pre_test_delay)
 
 	# If requested, override the ptype
 	if opt.ptype != None:
@@ -215,6 +215,7 @@ if __name__ == "__main__":
 	parser.add_argument('--no-qos', default=False, action='store_true', help="Don't send QoS data frames (experimental - may break some tests).")
 	parser.add_argument('--freebsd-cache', default=False, action='store_true', help="Sent EAP(OL) frames as (malformed) broadcast EAPOL/A-MSDUs.")
 	parser.add_argument('--connected-delay', type=float, default=1, help="Second to wait after AfterAuth before triggering Connected event")
+	parser.add_argument('--pre-test-delay', type=int, default=0, help="Delay before launching the test")
 	parser.add_argument('--to-self', default=False, action='store_true', help="Send ARP/DHCP/ICMP with same src and dst MAC address.")
 	parser.add_argument('--no-drivercheck', default=False, action='store_true', help="Don't check if patched drivers are being used.")
 	parser.add_argument('--stay-up', default=False, action='store_true', help="Don't quit when test has finished.")
diff --git a/research/fraginternals.py b/research/fraginternals.py
index 63d159ed6..d2f289154 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
@@ -260,7 +261,7 @@ class Test(metaclass=abc.ABCMeta):
 
 	def generate(self, station):
 		self.prepare(station)
-		self.enforce_delay()
+		self.enforce_delays()
 		self.enforce_inc_pn()
 
 	def check(self, p):
@@ -268,17 +269,24 @@ 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
 
-	def enforce_delay(self):
-		if self.delay == None or self.delay <= 0:
-			return
+	def enforce_delays(self):
+		inject_frags = self.get_actions(Action.Inject)
 
-		# Add a delay between injected fragments if requested
-		for frag in self.get_actions(Action.Inject)[1:]:
-			frag.delay = self.delay
+		# Add a delay before executing the first Inject action. This means a delay is added after
+		# possibly getting an IP via DHCP but before injecting the first test fragment/frame.
+		if self.pre_delay is not None and self.pre_delay > 0:
+			assert len(inject_frags) > 0
+			inject_frags[0].delay = self.pre_delay
+
+		# Add a delay between every next injected fragments if requested
+		if self.delay is not None and self.delay > 0:
+			for frag in inject_frags[1:]:
+				frag.delay = self.delay
 
 	def enforce_inc_pn(self):
 		if self.inc_pn == None: