diff --git a/src/qibojit/backends/cpu.py b/src/qibojit/backends/cpu.py
index ae0fd0d..ce823ba 100644
--- a/src/qibojit/backends/cpu.py
+++ b/src/qibojit/backends/cpu.py
@@ -156,7 +156,7 @@ def _as_custom_matrix(self, gate):
 
         if isinstance(gate, ParametrizedGate):
             if name == "GeneralizedRBS":  # pragma: no cover
-                # this is tests in qibo tests
+                # this is tested in qibo tests
                 theta = gate.init_kwargs["theta"]
                 phi = gate.init_kwargs["phi"]
                 return _matrix(gate.init_args[0], gate.init_args[1], theta, phi)