diff --git a/pyqtgraph/widgets/GraphicsView.py b/pyqtgraph/widgets/GraphicsView.py
index 4fc6f8b9..accaf2a9 100644
--- a/pyqtgraph/widgets/GraphicsView.py
+++ b/pyqtgraph/widgets/GraphicsView.py
@@ -131,10 +131,9 @@ class GraphicsView(QtGui.QGraphicsView):
         self.clickAccepted = False
 
         # Set a transparent background QPalette!
-        if QT_LIB in ["PySide2", "PyQt5"]:
-            palette = self.palette()
-            palette.setColor(QtGui.QPalette.Window, QtCore.Qt.transparent)
-            self.setPalette(palette)
+        palette = self.palette()
+        palette.setColor(QtGui.QPalette.Window, QtCore.Qt.transparent)
+        self.setPalette(palette)
 
     def setAntialiasing(self, aa):
         """Enable or disable default antialiasing.
diff --git a/pyqtgraph/widgets/tests/test_graphics_view.py b/pyqtgraph/widgets/tests/test_graphics_view.py
index 30aa7cb5..c2206985 100644
--- a/pyqtgraph/widgets/tests/test_graphics_view.py
+++ b/pyqtgraph/widgets/tests/test_graphics_view.py
@@ -11,9 +11,8 @@ def test_basics_graphics_view():
 
     palette = view.palette()
 
-    if pg.Qt.QT_LIB in ["PySide2", "PyQt5"]:
-        assert palette.isBrushSet(QtGui.QPalette.Active, QtGui.QPalette.Window)
-        assert palette.color(QtGui.QPalette.Window) == QtCore.Qt.transparent
+    assert palette.isBrushSet(QtGui.QPalette.Active, QtGui.QPalette.Window)
+    assert palette.color(QtGui.QPalette.Window) == QtCore.Qt.transparent
     assert view.backgroundBrush().color() == QtGui.QColor(0, 0, 0, 255)
 
     assert view.focusPolicy() == QtCore.Qt.StrongFocus
@@ -39,10 +38,8 @@ def test_basics_graphics_view():
     view.setBackground("w")
     assert view._background == "w"
     palette = view.palette()
-    if pg.Qt.QT_LIB in ["PySide2", "PyQt5"]:
-
-        assert palette.isBrushSet(QtGui.QPalette.Active, QtGui.QPalette.Window)
-        assert palette.color(QtGui.QPalette.Window) == QtCore.Qt.transparent
+    assert palette.isBrushSet(QtGui.QPalette.Active, QtGui.QPalette.Window)
+    assert palette.color(QtGui.QPalette.Window) == QtCore.Qt.transparent
     assert view.backgroundBrush().color() == QtCore.Qt.white
 
     # Set anti aliasing