diff --git a/scripts/rt-tester/t3-l1-pi-signal.tst b/scripts/rt-tester/t3-l1-pi-signal.tst
new file mode 100644
index 0000000..3e427da
--- /dev/null
+++ b/scripts/rt-tester/t3-l1-pi-signal.tst
@@ -0,0 +1,101 @@
+#
+# rt-mutex test
+#
+# Op: C(ommand)/T(est)/W(ait)
+# |  opcode
+# |  |     threadid: 0-7
+# |  |     |  opcode argument
+# |  |     |  |
+# C: lock: 0: 0
+#
+# Commands
+#
+# opcode	opcode argument
+# schedother	nice value
+# schedfifo	priority
+# lock		lock nr (0-7)
+# locknowait	lock nr (0-7)
+# lockint	lock nr (0-7)
+# lockintnowait	lock nr (0-7)
+# lockcont	lock nr (0-7)
+# unlock	lock nr (0-7)
+# lockbkl	lock nr (0-7)
+# unlockbkl	lock nr (0-7)
+# signal	thread to signal (0-7)
+# reset		0
+# resetevent	0
+#
+# Tests / Wait
+#
+# opcode	opcode argument
+#
+# prioeq	priority
+# priolt	priority
+# priogt	priority
+# nprioeq	normal priority
+# npriolt	normal priority
+# npriogt	normal priority
+# locked	lock nr (0-7)
+# blocked	lock nr (0-7)
+# blockedwake	lock nr (0-7)
+# unlocked	lock nr (0-7)
+# lockedbkl	dont care
+# blockedbkl	dont care
+# unlockedbkl	dont care
+# opcodeeq	command opcode or number
+# opcodelt	number
+# opcodegt	number
+# eventeq	number
+# eventgt	number
+# eventlt	number
+
+# Reset event counter
+C: resetevent:		0: 	0
+W: opcodeeq:		0: 	0
+
+# Set priorities
+C: schedother:		0: 	0
+W: opcodeeq:		0: 	0
+C: schedfifo:		1: 	80
+W: opcodeeq:		1: 	0
+C: schedfifo:		2: 	81
+W: opcodeeq:		2: 	0
+
+# T0 lock L0
+C: lock:		0:	0
+W: locked:		0: 	0
+
+# T1 lock L0, no wait in the wakeup path
+C: locknowait:		1: 	0
+W: blocked:		1: 	0
+T: prioeq:		0:	80
+T: prioeq:		1:	80
+
+# T2 lock L0 interruptible, no wait in the wakeup path
+C: lockintnowait:	2:	0
+W: blocked:		2: 	0
+T: prioeq:		0:	81
+T: prioeq:		1:	80
+
+# Interrupt T2
+C: signal:		2:	2
+W: unlocked:		2:	0
+T: prioeq:		1:	80
+T: prioeq:		0:	80
+
+T: locked:		0:	0
+T: blocked:		1:	0
+
+# T0 unlock L0
+C: unlock:		0: 	0
+
+# Wait until T1 has locked L0 and exit
+W: locked:		1:	0
+W: unlocked:		0: 	0
+T: priolt:		0:	1
+
+C: unlock:		1: 	0
+W: unlocked:		1: 	0
+
+
+