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Incorrect number of parameters for @patch decorated function

Reports functions decorated with @patch or @patch.object where the number of parameters does not match the number of mock objects injected by the decorators.

Each @patch decorator without an explicit new= argument injects one additional parameter. The innermost decorator injects the first parameter (after self), and the outermost injects the last.

Locating this inspection

By ID

Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.

PyMockPatchArgumentCount
Via Settings dialog

Path to the inspection settings via IntelliJ Platform IDE Settings dialog, when you need to adjust inspection settings directly from your IDE.

Settings or Preferences | Editor | Inspections | Python

Inspection ID: PyMockPatchArgumentCountInspection

Suppressing Inspection

You can suppress this inspection by placing the following comment marker before the code fragment where you no longer want messages from this inspection to appear:

//noinspection PyMockPatchArgumentCount

More detailed instructions as well as other ways and options that you have can be found in the product documentation:

Inspection Details

By default bundled with:

CLion 2026.2, IntelliJ IDEA 2026.2, PyCharm 2026.2, Qodana for JVM 2026.2,

Last modified: 30 June 2026