diff --git a/src/sage/plot/complex_plot.pyx b/src/sage/plot/complex_plot.pyx
index b77c69b2f77..0586a96ae55 100644
--- a/src/sage/plot/complex_plot.pyx
+++ b/src/sage/plot/complex_plot.pyx
@@ -563,7 +563,7 @@ def complex_to_cmap_rgb(z_values, cmap='turbo', contoured=False, tiled=False,
     import matplotlib as mpl
 
     if isinstance(cmap, str):
-        cmap = mpl.cm.get_cmap(cmap)
+        cmap = mpl.colormaps[cmap]
 
     if contour_base is None:
         if contour_type == "linear":
@@ -1206,11 +1206,11 @@ def complex_plot(f, x_range, y_range, contoured=False, tiled=False, cmap=None,
                 domain = np.linspace(0, 1, 256)
                 shifted_domain = np.roll(domain, 128)
                 default_cmap = mpl.colors.LinearSegmentedColormap.from_list(
-                    "sage_default", mpl.cm.get_cmap('hsv')(shifted_domain)
+                    "sage_default", mpl.colormaps['hsv'](shifted_domain)
                 )
                 cmap = default_cmap
             else:
-                cmap = mpl.cm.get_cmap(cmap)
+                cmap = mpl.colormaps[cmap]
         rgbs = complex_to_cmap_rgb(
             z_values, cmap=cmap, contoured=contoured, tiled=tiled,
             contour_type=contour_type, contour_base=contour_base,
diff --git a/src/sage/plot/contour_plot.py b/src/sage/plot/contour_plot.py
index c0cab456686..4accb309580 100644
--- a/src/sage/plot/contour_plot.py
+++ b/src/sage/plot/contour_plot.py
@@ -848,9 +848,7 @@ def f(x,y): return cos(x) + sin(y)
 
         sage: contour_plot(lambda x,y: 0, (-1,1), (-1,1),
         ....:              contours=[0], fill=False, cmap=['blue'])
-        ...
-        UserWarning: No contour levels were found within the data range.
-        Graphics object consisting of 1 graphics primitive
+        ...Graphics object consisting of 1 graphics primitive
 
     .. PLOT::
 
@@ -874,8 +872,7 @@ def f(x,y): return cos(x) + sin(y)
     Check that :trac:`18074` is fixed::
 
         sage: contour_plot(0, (0,1), (0,1))
-        ... UserWarning: No contour levels were found within the data range.
-        Graphics object consisting of 1 graphics primitive
+        ...Graphics object consisting of 1 graphics primitive
 
     Domain points in :trac:`11648` with complex output are now skipped::
 
diff --git a/src/sage/plot/graphics.py b/src/sage/plot/graphics.py
index 64ea1a7e10f..cdc99ced263 100644
--- a/src/sage/plot/graphics.py
+++ b/src/sage/plot/graphics.py
@@ -2341,7 +2341,7 @@ def _matplotlib_tick_formatter(self, subplot, base=(10, 10),
             sage: subplot = Figure().add_subplot(111)
             sage: p._objects[0]._render_on_subplot(subplot)
             sage: p._matplotlib_tick_formatter(subplot, **d)
-            (<AxesSubplot:...>,
+            (<Axes...>,
             <matplotlib.ticker.MaxNLocator object at ...>,
             <matplotlib.ticker.MaxNLocator object at ...>,
             <matplotlib.ticker.ScalarFormatter object at ...>,
diff --git a/src/sage/plot/multigraphics.py b/src/sage/plot/multigraphics.py
index 99c817f03a6..ae85183dc93 100644
--- a/src/sage/plot/multigraphics.py
+++ b/src/sage/plot/multigraphics.py
@@ -1207,7 +1207,7 @@ def _add_subplot(self, figure, index, **options):
             sage: fig = Figure()
             sage: ax1 = G._add_subplot(fig, 0)
             sage: type(ax1)
-            <class 'matplotlib.axes._subplots.AxesSubplot'>
+            <class 'matplotlib.axes...'>
             sage: ax2 = G._add_subplot(fig, 1)
             sage: fig.get_axes() == [ax1, ax2]
             True
diff --git a/src/sage/plot/plot3d/plot_field3d.py b/src/sage/plot/plot3d/plot_field3d.py
index bdf39391d3e..fe10e27f58f 100644
--- a/src/sage/plot/plot3d/plot_field3d.py
+++ b/src/sage/plot/plot3d/plot_field3d.py
@@ -126,9 +126,9 @@ def plot_vector_field3d(functions, xrange, yrange, zrange,
     vectors = [vector((ff(*point), gg(*point), hh(*point))) for point in points]
 
     try:
-        from matplotlib.cm import get_cmap
-        cm = get_cmap(colors)
-    except (TypeError, ValueError):
+        import matplotlib as mpl
+        cm = mpl.colormaps[colors]
+    except (TypeError, KeyError):
         cm = None
     if cm is None:
         if isinstance(colors, (list, tuple)):