diff --git a/autofit/non_linear/analysis/visualize.py b/autofit/non_linear/analysis/visualize.py
index 0e2ca5fab..364bf78bc 100644
--- a/autofit/non_linear/analysis/visualize.py
+++ b/autofit/non_linear/analysis/visualize.py
@@ -91,5 +91,12 @@ def visualize_combined(
         paths: AbstractPaths,
         instance,
         during_analysis,
+        quick_update: bool = False,
     ):
+        # ``quick_update`` is forwarded from
+        # ``AnalysisFactor.visualize_combined`` so subclasses can branch
+        # on the quick-update path (e.g. cheap incremental plots during a
+        # long search vs. full plots at the end). The default visualizer
+        # ignores it but must accept the kwarg without raising
+        # ``TypeError`` when overrides do not declare it.
         pass
diff --git a/test_autofit/analysis/test_visualizer_combined_kwargs.py b/test_autofit/analysis/test_visualizer_combined_kwargs.py
new file mode 100644
index 000000000..e1d2f3cd7
--- /dev/null
+++ b/test_autofit/analysis/test_visualizer_combined_kwargs.py
@@ -0,0 +1,63 @@
+"""
+Regression test: ``Visualizer.visualize_combined`` must accept the
+``quick_update`` kwarg that ``AnalysisFactor.visualize_combined``
+forwards. The original bug was that the base signature did not list
+``quick_update``, so any user Analysis without an explicit override
+crashed mid-search with::
+
+    TypeError: Visualizer.visualize_combined() got an unexpected
+    keyword argument 'quick_update'
+
+This only fired on graphical / joint-fit search paths whose
+periodic-update cadence calls ``visualize_combined`` with
+``quick_update=True`` partway through a long Dynesty chain.
+"""
+import inspect
+
+import autofit as af
+from autofit.non_linear.analysis.visualize import Visualizer
+
+
+def test_base_visualize_combined_accepts_quick_update_kwarg():
+    sig = inspect.signature(Visualizer.visualize_combined)
+    assert "quick_update" in sig.parameters, (
+        "Visualizer.visualize_combined must accept ``quick_update`` to match "
+        "the call site in AnalysisFactor.visualize_combined."
+    )
+    # And the kwarg must be optional so existing call sites that don't pass it
+    # continue to work.
+    assert sig.parameters["quick_update"].default is False
+
+
+def test_base_visualize_combined_callable_with_quick_update():
+    # The default impl is a no-op; the test is just that calling it with
+    # ``quick_update`` does not raise. Pass the minimum positional args.
+    Visualizer.visualize_combined(
+        analyses=[],
+        paths=None,
+        instance=None,
+        during_analysis=False,
+        quick_update=True,
+    )
+
+
+def test_analysis_factor_visualize_combined_default_visualizer():
+    """
+    End-to-end: ``AnalysisFactor.visualize_combined(quick_update=True)``
+    on a default analysis (whose ``Visualizer`` is the base class) must
+    not raise. Reproduces the original crash path.
+    """
+    factor = af.AnalysisFactor(
+        prior_model=af.Model(af.ex.Gaussian),
+        analysis=af.Analysis(),
+    )
+    # ``analyses`` must be a list of factors so the unwrap step
+    # (``getattr(factor, "analysis", factor)``) yields valid Analysis
+    # objects when the visualizer is invoked.
+    factor.visualize_combined(
+        analyses=[factor],
+        paths=None,
+        instance=None,
+        during_analysis=False,
+        quick_update=True,
+    )