diff --git a/src/qibocal/protocols/characterization/qubit_spectroscopy.py b/src/qibocal/protocols/characterization/qubit_spectroscopy.py
index e7db7844a..4b63e5e82 100644
--- a/src/qibocal/protocols/characterization/qubit_spectroscopy.py
+++ b/src/qibocal/protocols/characterization/qubit_spectroscopy.py
@@ -140,7 +140,7 @@ def _fit(data: QubitSpectroscopyData) -> QubitSpectroscopyResults:
             )
             chi2[qubit] = (
                 chi2_reduced(
-                    data[qubit].freq,
+                    data[qubit].signal,
                     lorentzian(data[qubit].freq, *fitted_parameters[qubit]),
                     data[qubit].error_signal,
                 ),
diff --git a/src/qibocal/protocols/characterization/rabi/amplitude.py b/src/qibocal/protocols/characterization/rabi/amplitude.py
index e7a11ca78..8759c7183 100644
--- a/src/qibocal/protocols/characterization/rabi/amplitude.py
+++ b/src/qibocal/protocols/characterization/rabi/amplitude.py
@@ -173,7 +173,6 @@ def _fit(data: RabiAmplitudeData) -> RabiAmplitudeResults:
 
 def _plot(data: RabiAmplitudeData, target: QubitId, fit: RabiAmplitudeResults = None):
     """Plotting function for RabiAmplitude."""
-    print(fit)
     return utils.plot_probabilities(data, target, fit)
 
 
diff --git a/src/qibocal/protocols/characterization/resonator_spectroscopy.py b/src/qibocal/protocols/characterization/resonator_spectroscopy.py
index 35dd8fe60..f3bae440e 100644
--- a/src/qibocal/protocols/characterization/resonator_spectroscopy.py
+++ b/src/qibocal/protocols/characterization/resonator_spectroscopy.py
@@ -219,7 +219,7 @@ def _fit(
                 bare_frequency[qubit] = frequency[qubit]
             chi2[qubit] = (
                 chi2_reduced(
-                    data[qubit].freq,
+                    data[qubit].signal,
                     lorentzian(data[qubit].freq, *fitted_parameters[qubit]),
                     data[qubit].error_signal,
                 ),