diff --git a/Makefile b/Makefile
index a0579980c..c09123e91 100644
--- a/Makefile
+++ b/Makefile
@@ -337,7 +337,7 @@ install-caravel-cocotb:
 
 .PHONY: setup-cocotb-env
 setup-cocotb-env:
-	@(python3 $(PROJECT_ROOT)/verilog/dv/setup-cocotb.py $(CARAVEL_ROOT) $(MCW_ROOT) $(PDK_ROOT) $(PDK) $(PROJECT_ROOT))
+	@(python3 $(PROJECT_ROOT)/verilog/dv/setup-cocotb.py $(CARAVEL_ROOT) $(PDK_ROOT) $(PDK) $(PROJECT_ROOT))
 
 .PHONY: setup-cocotb
 setup-cocotb: install-caravel-cocotb setup-cocotb-env simenv-cocotb
diff --git a/verilog/dv/setup-cocotb.py b/verilog/dv/setup-cocotb.py
index cb35e2cfb..0a1e3b5d2 100644
--- a/verilog/dv/setup-cocotb.py
+++ b/verilog/dv/setup-cocotb.py
@@ -4,14 +4,12 @@
 
 @click.command()
 @click.argument('caravel_root', type=click.Path(exists=True))
-@click.argument('mcw_root', type=click.Path(exists=True))
 @click.argument('pdk_root', type=click.Path(exists=True))
 @click.argument('pdk')
 @click.argument('user_project_root', type=click.Path(exists=True))
-def update_design_info(caravel_root, mcw_root, pdk_root, pdk, user_project_root):
+def update_design_info(caravel_root, pdk_root, pdk, user_project_root):
     data = {
         'CARAVEL_ROOT': caravel_root,
-        'MCW_ROOT': mcw_root,
         'USER_PROJECT_ROOT': user_project_root,
         'PDK_ROOT': pdk_root,
         'PDK': pdk,