diff --git a/tests/Sram.py b/tests/Sram.py
index 9c90dad..0cc22f0 100644
--- a/tests/Sram.py
+++ b/tests/Sram.py
@@ -1,7 +1,7 @@
 import logging
 import cocotb
 from cocotb.utils import get_sim_time
-from cocotb.triggers import FallingEdge, RisingEdge, Timer, ReadOnly
+from cocotb.triggers import FallingEdge, RisingEdge, Timer
 
 
 class Sram:
@@ -111,7 +111,6 @@ class SramMonitor(Sram):
             elif self._ren.value:
                 _adr = self._adr.value
                 await self._clkedge
-                await ReadOnly()
                 self._transactions[str(get_sim_time('ns'))] = {
                     "type" : "read",
                     "adr"  : _adr,
diff --git a/tests/Uart.py b/tests/Uart.py
index 01aa4d1..32e5e0e 100644
--- a/tests/Uart.py
+++ b/tests/Uart.py
@@ -1,5 +1,5 @@
 import logging
-from cocotb.triggers import FallingEdge, RisingEdge, Timer, ReadOnly
+from cocotb.triggers import FallingEdge, RisingEdge, Timer
 
 
 class Uart:
@@ -53,7 +53,6 @@ class UartReceiver(Uart):
         self._rec = 0
         for x in range(self._bits):
             await self._wait_cycle()
-            await ReadOnly()
             self._rec |= bool(self._txrx.value.integer) << x
 
         if self._par:
@@ -70,21 +69,18 @@ class UartReceiver(Uart):
         """Consume and check start bit"""
         for x in range(int(self._div/2)):
             await self._clkedge
-        await ReadOnly()
         if self._txrx.value == 1:
             self.log.warning("Start bit set")
 
     async def _get_stop_bit(self):
         """Consume and check stop bit"""
         await self._wait_cycle()
-        await ReadOnly()
         if self._txrx.value == 0:
             self.log.warning("Stop bit not set")
 
     async def _get_parity_bit(self):
         """Consume and check parity bit"""
         await self._wait_cycle()
-        await ReadOnly()
         if self.odd_parity(self._rec) != self._txrx.value:
             self.log.warning("Parity wrong")
 
diff --git a/tests/Vai.py b/tests/Vai.py
index 8a89d07..f5d6b4d 100644
--- a/tests/Vai.py
+++ b/tests/Vai.py
@@ -1,7 +1,7 @@
 import logging
 import cocotb
 from cocotb.utils import get_sim_time
-from cocotb.triggers import FallingEdge, RisingEdge, Timer, ReadOnly
+from cocotb.triggers import FallingEdge, RisingEdge, Timer
 
 
 class Vai:
@@ -56,7 +56,6 @@ class VaiDriver(Vai):
         self.log.info(f"Send data:    {_info}")
 
         while True:
-            await ReadOnly()
             if self._accept.value:
                 break
             await self._clkedge
@@ -84,7 +83,6 @@ class VaiReceiver(Vai):
             await self._clkedge
 
         while True:
-            await ReadOnly()
             if self._valid.value:
                 break
             await self._clkedge
diff --git a/tests/tb_aes.py b/tests/tb_aes.py
index 8376f7c..6566b57 100644
--- a/tests/tb_aes.py
+++ b/tests/tb_aes.py
@@ -1,13 +1,10 @@
 import logging
-import random
 import cocotb
-import pprint
 from Vai import VaiDriver, VaiReceiver, VaiMonitor
 from cocotb.clock import Clock
 from cocotb.queue import Queue
-from cocotb.triggers import FallingEdge, RisingEdge, Timer, ReadOnly
+from cocotb.triggers import RisingEdge, Timer
 from Crypto.Cipher import AES
-from Crypto.Util.number import long_to_bytes, getRandomNBitInteger
 import vsc
 
 
diff --git a/tests/tb_uartrx.py b/tests/tb_uartrx.py
index 6f83b0c..14ef269 100644
--- a/tests/tb_uartrx.py
+++ b/tests/tb_uartrx.py
@@ -1,10 +1,10 @@
 import logging
 import random
 import cocotb
-from Uart import UartDriver, UartReceiver
-from Vai import VaiDriver, VaiReceiver
+from Uart import UartDriver
+from Vai import VaiReceiver
 from cocotb.clock import Clock
-from cocotb.triggers import FallingEdge, RisingEdge, Timer, ReadOnly
+from cocotb.triggers import RisingEdge, Timer
 
 
 # Reset coroutine
diff --git a/tests/tb_uarttx.py b/tests/tb_uarttx.py
index b176ee6..2f81abc 100644
--- a/tests/tb_uarttx.py
+++ b/tests/tb_uarttx.py
@@ -1,10 +1,10 @@
 import logging
 import random
 import cocotb
-from Uart import UartDriver, UartReceiver
-from Vai import VaiDriver, VaiReceiver
+from Uart import UartReceiver
+from Vai import VaiDriver
 from cocotb.clock import Clock
-from cocotb.triggers import FallingEdge, RisingEdge, Timer, ReadOnly
+from cocotb.triggers import RisingEdge, Timer
 
 
 # Reset coroutine
diff --git a/tests/tb_wishbone.py b/tests/tb_wishbone.py
index 09fa7e0..6a53694 100644
--- a/tests/tb_wishbone.py
+++ b/tests/tb_wishbone.py
@@ -5,7 +5,7 @@ import wavedrom
 from collections import defaultdict
 from Sram import SramRead, SramWrite, SramMonitor
 from cocotb.clock import Clock
-from cocotb.triggers import FallingEdge, RisingEdge, Timer, ReadOnly
+from cocotb.triggers import RisingEdge, Timer
 from cocotbext.wishbone.driver import WishboneMaster, WBOp
 from cocotb.wavedrom import Wavedrom, trace
 
@@ -77,6 +77,8 @@ async def test_wishbone(dut):
             data = random.randint(0, 2**16-1)
             await wbmaster.send_cycle([WBOp(adr=adr, dat=data)])
             rec = await wbmaster.send_cycle([WBOp(adr=adr)])
+            assert rec[0].datrd == data, \
+                f"Read data incorrect, got {hex(rec[0].datrd)}, expected {hex(data)}"
 
         # Print out waveforms as json & svg
         _wave = waves.dumpj()