diff --git a/lib/matplotlib/tests/test_backend_pdf.py b/lib/matplotlib/tests/test_backend_pdf.py
index 90db19110814..439f11c15dbd 100644
--- a/lib/matplotlib/tests/test_backend_pdf.py
+++ b/lib/matplotlib/tests/test_backend_pdf.py
@@ -587,34 +587,6 @@ def test_scatter_offaxis_colored_pdf_size():
     )
 
 
-@check_figures_equal(extensions=["pdf"])
-def test_scatter_offaxis_colored_visual(fig_test, fig_ref):
-    """
-    Test that on-axis scatter with per-point colors still renders correctly.
-
-    Ensures the optimization for off-axis markers doesn't break normal
-    scatter rendering.
-    """
-    rng = np.random.default_rng(19680801)
-
-    n_points = 100
-    x = rng.random(n_points) * 5
-    y = rng.random(n_points) * 5
-    c = rng.random(n_points)
-
-    # Test figure: scatter with clipping optimization
-    ax_test = fig_test.subplots()
-    ax_test.scatter(x, y, c=c, s=50)
-    ax_test.set_xlim(0, 10)
-    ax_test.set_ylim(0, 10)
-
-    # Reference figure: should look identical
-    ax_ref = fig_ref.subplots()
-    ax_ref.scatter(x, y, c=c, s=50)
-    ax_ref.set_xlim(0, 10)
-    ax_ref.set_ylim(0, 10)
-
-
 @check_figures_equal(extensions=["pdf"])
 def test_scatter_mixed_onoff_axis(fig_test, fig_ref):
     """
@@ -647,88 +619,3 @@ def test_scatter_mixed_onoff_axis(fig_test, fig_ref):
     ax_ref.scatter(x_on, y_on, c=c[:n_points], s=50)
     ax_ref.set_xlim(0, 10)
     ax_ref.set_ylim(0, 10)
-
-
-@check_figures_equal(extensions=["pdf"])
-def test_scatter_large_markers_partial_clip(fig_test, fig_ref):
-    """
-    Test that large markers are rendered when partially visible.
-
-    Addresses reviewer concern: markers with centers outside the canvas but
-    with edges extending into the visible area should still be rendered.
-    """
-    # Create markers just outside the visible area
-    # Canvas is 0-10, markers at x=-0.5 and x=10.5
-    x = np.array([-0.5, 10.5, 5])  # left edge, right edge, center
-    y = np.array([5, 5, -0.5])  # center, center, bottom edge
-    c = np.array([0.2, 0.5, 0.8])
-
-    # Test figure: large markers (s=500 ≈ 11 points radius)
-    # Centers are outside, but marker edges extend into visible area
-    ax_test = fig_test.subplots()
-    ax_test.scatter(x, y, c=c, s=500)
-    ax_test.set_xlim(0, 10)
-    ax_test.set_ylim(0, 10)
-
-    # Reference figure: same plot (should render identically)
-    ax_ref = fig_ref.subplots()
-    ax_ref.scatter(x, y, c=c, s=500)
-    ax_ref.set_xlim(0, 10)
-    ax_ref.set_ylim(0, 10)
-
-
-@check_figures_equal(extensions=["pdf"])
-def test_scatter_logscale(fig_test, fig_ref):
-    """
-    Test scatter optimization with logarithmic scales.
-
-    Ensures bounds checking works correctly in log-transformed coordinates.
-    """
-    rng = np.random.default_rng(19680801)
-
-    # Create points across several orders of magnitude
-    n_points = 50
-    x = 10 ** (rng.random(n_points) * 4)  # 1 to 10000
-    y = 10 ** (rng.random(n_points) * 4)
-    c = rng.random(n_points)
-
-    # Test figure: log scale with points mostly outside view
-    ax_test = fig_test.subplots()
-    ax_test.scatter(x, y, c=c, s=50)
-    ax_test.set_xscale('log')
-    ax_test.set_yscale('log')
-    ax_test.set_xlim(100, 1000)  # Only show middle range
-    ax_test.set_ylim(100, 1000)
-
-    # Reference figure: should render identically
-    ax_ref = fig_ref.subplots()
-    ax_ref.scatter(x, y, c=c, s=50)
-    ax_ref.set_xscale('log')
-    ax_ref.set_yscale('log')
-    ax_ref.set_xlim(100, 1000)
-    ax_ref.set_ylim(100, 1000)
-
-
-@check_figures_equal(extensions=["pdf"])
-def test_scatter_polar(fig_test, fig_ref):
-    """
-    Test scatter optimization with polar coordinates.
-
-    Ensures bounds checking works correctly in polar projections.
-    """
-    rng = np.random.default_rng(19680801)
-
-    n_points = 50
-    theta = rng.random(n_points) * 2 * np.pi
-    r = rng.random(n_points) * 3
-    c = rng.random(n_points)
-
-    # Test figure: polar projection
-    ax_test = fig_test.subplots(subplot_kw={'projection': 'polar'})
-    ax_test.scatter(theta, r, c=c, s=50)
-    ax_test.set_ylim(0, 2)  # Limit radial range
-
-    # Reference figure: should render identically
-    ax_ref = fig_ref.subplots(subplot_kw={'projection': 'polar'})
-    ax_ref.scatter(theta, r, c=c, s=50)
-    ax_ref.set_ylim(0, 2)