diff --git a/src/fabio/app/viewer.py b/src/fabio/app/viewer.py
index c8c3ef1d..9df853f1 100644
--- a/src/fabio/app/viewer.py
+++ b/src/fabio/app/viewer.py
@@ -39,7 +39,7 @@
 __author__ = "Gaël Goret, Jérôme Kieffer"
 __copyright__ = "2015-2026 ESRF"
 __licence__ = "MIT"
-__date__ = "12/03/2026"
+__date__ = "20/08/2026"
 
 
 import sys
diff --git a/src/fabio/qt/dialogs.py b/src/fabio/qt/dialogs.py
index 5c94ded8..e28d2808 100644
--- a/src/fabio/qt/dialogs.py
+++ b/src/fabio/qt/dialogs.py
@@ -38,12 +38,13 @@
 import numpy
 from qtpy import QtWidgets as qt
 from qtpy.QtWidgets import (
-    QMessageBox,
-    QLabel,
-    QDialog,
-    QDialogButtonBox,
-    QGroupBox,
-)
+        QMessageBox,
+        QLabel,
+        QDialog,
+        QDialogButtonBox,
+        QGroupBox,
+    )
+
 
 numpy.seterr(divide="ignore")
 output_format = [
diff --git a/src/fabio/qt/matplotlib.py b/src/fabio/qt/matplotlib.py
index 7c3f7eda..c4930bf4 100644
--- a/src/fabio/qt/matplotlib.py
+++ b/src/fabio/qt/matplotlib.py
@@ -1,6 +1,6 @@
 # /*##########################################################################
 #
-# Copyright (c) 2016-2024 European Synchrotron Radiation Facility
+# Copyright (c) 2016-2026 European Synchrotron Radiation Facility
 #
 # Permission is hereby granted, free of charge, to any person obtaining a copy
 # of this software and associated documentation files (the "Software"), to deal
@@ -30,12 +30,10 @@
 to the used backend.
 """
 
-from __future__ import annotations
-
 
 __authors__ = ["T. Vincent"]
 __license__ = "MIT"
-__date__ = "12/03/2026"
+__date__ = "20/08/2026"
 
 
 import io
@@ -45,6 +43,7 @@
 from qtpy import API as BINDING
 from qtpy.QtGui import QFont
 
+
 # This must be performed before any import from matplotlib
 if BINDING in ("pyside6", "pyqt6"):
     matplotlib.use("QtAgg", force=False)
diff --git a/src/fabio/qt/viewer.py b/src/fabio/qt/viewer.py
index ea442b22..c2f90290 100644
--- a/src/fabio/qt/viewer.py
+++ b/src/fabio/qt/viewer.py
@@ -51,25 +51,25 @@
 from qtpy import QtCore as qtc
 from qtpy.QtGui import QIcon
 from qtpy.QtWidgets import (
-    QSizePolicy,
-    QFileDialog,
-    QMessageBox,
-    QAction,
-    QComboBox,
-    QPlainTextEdit,
-    QLabel,
-    QSplitter,
-    QTabWidget,
-    QWidget,
-    QProgressBar,
-    QGroupBox,
-    QVBoxLayout,
-    QHBoxLayout,
-    QPushButton,
-    QListWidget,
-    QCheckBox,
-    QButtonGroup
-)
+        QSizePolicy,
+        QFileDialog,
+        QMessageBox,
+        QAction,
+        QComboBox,
+        QPlainTextEdit,
+        QLabel,
+        QSplitter,
+        QTabWidget,
+        QWidget,
+        QProgressBar,
+        QGroupBox,
+        QVBoxLayout,
+        QHBoxLayout,
+        QPushButton,
+        QListWidget,
+        QCheckBox,
+        QButtonGroup
+    )
 # Matplotlib imports (unchanged)
 from matplotlib.figure import Figure
 from .matplotlib import FigureCanvasQTAgg
@@ -137,7 +137,7 @@ def format_header(self, d):
 
         :param d: dict containing headers
         :return: formatted string
-	"""
+        """
         keys = sorted(d.keys())
         return " \n".join([f"{k}: {d[k]}" for k in keys]) + " \n"
 
diff --git a/src/fabio/test/test_import.py b/src/fabio/test/test_import.py
index 6998e027..da552a93 100644
--- a/src/fabio/test/test_import.py
+++ b/src/fabio/test/test_import.py
@@ -14,17 +14,22 @@
 class TestImport(unittest.TestCase):
     def test_import_all(self):
         import fabio
-
+        skip_without_qt = {
+            "fabio.app.viewer",
+            "fabio.qt.dialogs",
+            "fabio.qt.matplotlib",
+        }
+        with_qt = os.environ.get("WITH_QT_TEST", "True").lower() not in ("0", "false", "no")
+    
         base = os.path.split(fabio.__path__[0])[0] + "/"
         for root, dirs, files in os.walk(fabio.__path__[0]):
             for f in files:
                 if f.endswith(".py"):
-                    module = os.path.join(root, f[:-3])[len(base) :].replace(
-                        os.sep, "."
-                    )
+                    module = os.path.join(root, f[:-3])[len(base):].replace(os.sep, ".")
+                    if not with_qt and module in skip_without_qt:
+                        continue
                     __import__(module)
 
-
 def suite():
     loadTests = unittest.defaultTestLoader.loadTestsFromTestCase
     testsuite = unittest.TestSuite()