diff --git a/tb/test_axis_frame_length_adjust_fifo.py b/tb/test_axis_frame_length_adjust_fifo.py
index a84a15a5..5f7b579d 100755
--- a/tb/test_axis_frame_length_adjust_fifo.py
+++ b/tb/test_axis_frame_length_adjust_fifo.py
@@ -235,6 +235,8 @@ def bench():
 
                         yield wait()
 
+                        yield clk.posedge
+                        yield clk.posedge
                         yield clk.posedge
                         yield clk.posedge
                         yield clk.posedge
@@ -276,6 +278,8 @@ def bench():
 
                         yield wait()
 
+                        yield clk.posedge
+                        yield clk.posedge
                         yield clk.posedge
                         yield clk.posedge
                         yield clk.posedge
@@ -336,6 +340,8 @@ def bench():
 
                         yield wait()
 
+                        yield clk.posedge
+                        yield clk.posedge
                         yield clk.posedge
                         yield clk.posedge
                         yield clk.posedge
diff --git a/tb/test_axis_frame_length_adjust_fifo_64.py b/tb/test_axis_frame_length_adjust_fifo_64.py
index 2bbffe70..53b07fc4 100755
--- a/tb/test_axis_frame_length_adjust_fifo_64.py
+++ b/tb/test_axis_frame_length_adjust_fifo_64.py
@@ -246,6 +246,8 @@ def bench():
 
                         yield wait()
 
+                        yield clk.posedge
+                        yield clk.posedge
                         yield clk.posedge
                         yield clk.posedge
                         yield clk.posedge
@@ -287,6 +289,8 @@ def bench():
 
                         yield wait()
 
+                        yield clk.posedge
+                        yield clk.posedge
                         yield clk.posedge
                         yield clk.posedge
                         yield clk.posedge
@@ -347,6 +351,8 @@ def bench():
 
                         yield wait()
 
+                        yield clk.posedge
+                        yield clk.posedge
                         yield clk.posedge
                         yield clk.posedge
                         yield clk.posedge