@@ -0,0 +1,6 @@
+subplots_adjust no longer changes layout manager
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+Previously, if a user called `~matplotlib.Figure.subplots_adjust`, then 
+``constrained_layout`` was deactivated; this will no longer happen.  If 
+the user wants `~matplotlib.Figure.subplots_adjust` to have an effect 
+they need to use a compatible layout engine.  
@@ -1147,8 +1147,8 @@ def colorbar(self, mappable, cax=None, ax=None, use_gridspec=True, **kw):
                     "to colorbar().")
 
         if use_gridspec:
-            if (self.layout_engine is not None and
-                    not self.layout_engine.colorbar_gridspec):
+            if (self.get_layout_engine() is not None and
+                    not self.get_layout_engine().colorbar_gridspec):
                 use_gridspec = False
         # Store the value of gca so that we can set it back later on.
         if cax is None:
@@ -2064,6 +2064,9 @@ def get_constrained_layout_pads(self, relative=False):
         """
         return self._parent.get_constrained_layout_pads(relative=relative)
 
+    def get_layout_engine(self):
+        return self._parent.get_layout_engine()
+
     @property
     def axes(self):
         """
 
@@ -505,14 +505,6 @@ def test_figure_repr():
     assert repr(fig) == "<Figure size 100x200 with 0 Axes>"
 
 
-def test_warn_cl_plus_tl():
-    fig, ax = plt.subplots(constrained_layout=True)
-    with pytest.warns(UserWarning):
-        # this should warn,
-        fig.subplots_adjust(top=0.8)
-    assert not(fig.get_constrained_layout())
-
-
 @check_figures_equal(extensions=["png", "pdf"])
 def test_add_artist(fig_test, fig_ref):
     fig_test.set_dpi(100)
@@ -689,8 +681,8 @@ def test_all_nested(self, fig_test, fig_ref):
         x = [["A", "B"], ["C", "D"]]
         y = [["E", "F"], ["G", "H"]]
 
-        fig_ref.set_constrained_layout(True)
-        fig_test.set_constrained_layout(True)
+        fig_ref.set_layout_engine("constrained")
+        fig_test.set_layout_engine("constrained")
 
         grid_axes = fig_test.subplot_mosaic([[x, y]])
         for ax in grid_axes.values():
@@ -710,8 +702,8 @@ def test_all_nested(self, fig_test, fig_ref):
     @check_figures_equal(extensions=["png"])
     def test_nested(self, fig_test, fig_ref):
 
-        fig_ref.set_constrained_layout(True)
-        fig_test.set_constrained_layout(True)
+        fig_ref.set_layout_engine("constrained")
+        fig_test.set_layout_engine("constrained")
 
         x = [["A", "B"], ["C", "D"]]