--- a/eric6/Tools/UIPreviewer.py	Wed Apr 14 19:38:19 2021 +0200
+++ b/eric6/Tools/UIPreviewer.py	Wed Apr 14 19:59:16 2021 +0200
@@ -7,6 +7,8 @@
 Module implementing the UI Previewer main window.
 """
 
+import contextlib
+
 from PyQt5.QtCore import QDir, QFileInfo, QEvent, QSize, Qt
 from PyQt5.QtGui import QKeySequence, QImageWriter, QPainter
 from PyQt5.QtWidgets import (
@@ -347,10 +349,8 @@
             self.mainWidget = None
             
         # load the file
-        try:
+        with contextlib.suppress(Exception):
             self.mainWidget = uic.loadUi(fn)
-        except Exception:       # secok
-            pass
         
         if self.mainWidget:
             self.currentFile = fn