diff --git a/lib/matplotlib/figure.py b/lib/matplotlib/figure.py
index 5bbb786984d2..447f508194a1 100644
--- a/lib/matplotlib/figure.py
+++ b/lib/matplotlib/figure.py
@@ -2426,9 +2426,12 @@ def __init__(self,
if isinstance(tight_layout, dict):
self.get_layout_engine().set(**tight_layout)
elif constrained_layout is not None:
- self.set_layout_engine(layout='constrained')
if isinstance(constrained_layout, dict):
+ self.set_layout_engine(layout='constrained')
self.get_layout_engine().set(**constrained_layout)
+ elif constrained_layout:
+ self.set_layout_engine(layout='constrained')
+
else:
# everything is None, so use default:
self.set_layout_engine(layout=layout)
diff --git a/lib/matplotlib/tests/test_constrainedlayout.py b/lib/matplotlib/tests/test_constrainedlayout.py
index 35eb850fcd70..64906b74c3ff 100644
--- a/lib/matplotlib/tests/test_constrainedlayout.py
+++ b/lib/matplotlib/tests/test_constrainedlayout.py
@@ -656,3 +656,14 @@ def test_compressed1():
pos = axs[1, 2].get_position()
np.testing.assert_allclose(pos.x1, 0.8618, atol=1e-3)
np.testing.assert_allclose(pos.y0, 0.1934, atol=1e-3)
+
+
+@pytest.mark.parametrize('arg, state', [
+ (True, True),
+ (False, False),
+ ({}, True),
+ ({'rect': None}, True)
+])
+def test_set_constrained_layout(arg, state):
+ fig, ax = plt.subplots(constrained_layout=arg)
+ assert fig.get_constrained_layout() is state
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