diff --git a/pyqtgraph/graphicsItems/tests/test_PlotCurveItem.py b/pyqtgraph/graphicsItems/tests/test_PlotCurveItem.py
index 17f5894b..a3c34b11 100644
--- a/pyqtgraph/graphicsItems/tests/test_PlotCurveItem.py
+++ b/pyqtgraph/graphicsItems/tests/test_PlotCurveItem.py
@@ -5,6 +5,7 @@ from pyqtgraph.tests import assertImageApproved
 
 def test_PlotCurveItem():
     p = pg.GraphicsWindow()
+    p.ci.layout.setContentsMargins(4, 4, 4, 4)  # default margins vary by platform
     v = p.addViewBox()
     p.resize(200, 150)
     data = np.array([1,4,2,3,np.inf,5,7,6,-np.inf,8,10,9,np.nan,-1,-2,0])
@@ -14,7 +15,7 @@ def test_PlotCurveItem():
     
     # Check auto-range works. Some platform differences may be expected..
     checkRange = np.array([[-1.1457564053237301, 16.145756405323731], [-3.076811473165955, 11.076811473165955]])
-    assert np.all(np.abs(np.array(v.viewRange()) - checkRange) < 0.1)
+    assert np.allclose(v.viewRange(), checkRange)
     
     assertImageApproved(p, 'plotcurveitem/connectall', "Plot curve with all points connected.")