diff --git a/tasks.py b/tasks.py
index 7dd003f..3926691 100644
--- a/tasks.py
+++ b/tasks.py
@@ -213,7 +213,7 @@ def synth(c, target):
     print(f"Wrote bitstream to {bitstream}")
 
 @task
-def test(c, target):
+def test(c, target, verbose=False):
     to_run = []
     for target in expand_test_target(target):
         out_info, out_sim, out_bsc = ensure_build_dirs(target, "info", "sim", "bsc")
@@ -227,7 +227,8 @@ def test(c, target):
         testdata_tgt = testdata_tgt.relative_to(out_sim, walk_up=True)
         testdata.unlink(missing_ok=True)
         testdata.symlink_to(testdata_tgt, target_is_directory=True)
-        to_run.append((out_sim, f"./TB -V {target.stem}.vcd"))
+        cmd = f"./TB -V {target.stem}.vcd {'+v' if verbose else ''}"
+        to_run.append((out_sim, cmd))
     for d, cmd in to_run:
         print("")
         with c.cd(d):