diff --git a/arcjetCV/gui/main_window.py b/arcjetCV/gui/main_window.py
index c422f53..6593b97 100644
--- a/arcjetCV/gui/main_window.py
+++ b/arcjetCV/gui/main_window.py
@@ -8,7 +8,7 @@
 from PySide6 import QtWidgets
 from PySide6.QtWidgets import QMessageBox
 from PySide6.QtCore import Signal
-from PySide6.QtGui import QPixmap, QIcon
+from PySide6.QtGui import QIcon
 import matplotlib.pyplot as plt
 from matplotlib.colors import rgb_to_hsv
 from matplotlib.widgets import RectangleSelector
@@ -32,6 +32,8 @@ def __init__(self):
         # Initialize the user interface
         self.ui = Ui_MainWindow()
         self.ui.setupUi(self)
+        
+        self.testing = False
 
         # Set the application icon
         self.logo_path = os.path.join(
@@ -403,12 +405,14 @@ def load_video(self):
                     self.NEW_VIDEO = False
 
             except Exception as e:
-                print("Could not load video")
-                msg = QMessageBox()
-                msg.setWindowTitle("arcjetCV Warning")
-                msg.setText("! Could not load video !:\n" + str(e))
-                msg.setIcon(QMessageBox.Critical)
-                msg.exec()
+                if self.testing:
+                    print("Could not load video")
+                else:
+                    msg = QMessageBox()
+                    msg.setWindowTitle("arcjetCV Warning")
+                    msg.setText("! Could not load video !:\n" + str(e))
+                    msg.setIcon(QMessageBox.Critical)
+                    msg.exec()
 
     def plot_location(self, reset=False):
         n = self.ui.spinBox_FrameIndex.value()
@@ -467,11 +471,14 @@ def process_all(self):
         )
 
         # Create a message box
-        self.msg_box = QMessageBox()
-        self.msg_box.setWindowTitle("Video Processed")
-        self.msg_box.setText("The video has been processed.")
-        self.msg_box.setIcon(QMessageBox.Information)
-        self.msg_box.exec()  # Display the message box
+        if self.testing:
+            print("The video has been processed.")
+        else:
+            self.msg_box = QMessageBox()
+            self.msg_box.setWindowTitle("Video Processed")
+            self.msg_box.setText("The video has been processed.")
+            self.msg_box.setIcon(QMessageBox.Information)
+            self.msg_box.exec()  # Display the message box
 
     def grab_ui_values(self):
         inputdict = {"SEGMENT_METHOD": str(self.ui.comboBox_filterType.currentText())}
@@ -539,9 +546,10 @@ def load_outputs(self):
                 self.ui.basebar.setText("Finished loading files")
 
         except Exception as e:
-            QMessageBox.warning(
-                None, "Warning", "!!! File loading failed !!!:\n" + str(e)
-            )
+            if self.testing:
+                print("!!! File loading failed !!!:\n" + str(e))
+            else:
+                QMessageBox.warning(None, "Warning", "!!! File loading failed !!!:\n" + str(e))
 
         self.plot_outputs()
 
@@ -797,16 +805,17 @@ def plot_outputs(self):
                 self.ui.basebar.setText("Finished plotting data")
             else:
                 self.ui.basebar.setText("Not enough data to plot")
-                QMessageBox.warning(
-                    None,
-                    "Warning",
-                    "!!! Not enough data to plot !!!: only %i points"
-                    % len(self.raw_outputs),
-                )
+                if self.testing:
+                    print("Not enough data to plot")
+                else:
+                    QMessageBox.warning(None, "Warning", "!!! Not enough data to plot !!!: only %i points" % len(self.raw_outputs))
 
         except Exception as e:
             self.ui.basebar.setText("!!! Plotting failed !!!")
-            QMessageBox.warning(None, "Warning", "!!! Plotting failed !!!:\n" + str(e))
+            if self.testing:
+                print("Warning", "!!! Plotting failed !!!:\n" + str(e))
+            else:
+                QMessageBox.warning(None, "Warning", "!!! Plotting failed !!!:\n" + str(e))
 
         self.ui.Window1.repaint()
         self.ui.Window2.repaint()
@@ -853,9 +862,10 @@ def save_plots(self, name):
 
         except Exception as e:
             self.ui.basebar.setText("!!! Plot saving failed !!!")
-            QMessageBox.warning(
-                None, "Warning", "!!! Plot saving failed !!!:\n" + str(e)
-            )
+            if self.testing:
+                print("Warning", "!!! Plot saving failed !!!:\n" + str(e))
+            else:
+                QMessageBox.warning(None, "Warning", "!!! Plot saving failed !!!:\n" + str(e))
 
     def export_to_csv(self):
         if self.time_series is not None:
@@ -909,9 +919,10 @@ def export_to_csv(self):
 
             except Exception as e:
                 self.ui.basebar.setText("!!! CSV export failed !!!")
-                QMessageBox.warning(
-                    None, "Warning", "!!! CSV export failed !!!:\n" + str(e)
-                )
+                if self.testing:
+                    print("Warning", "!!! CSV export failed !!!:\n" + str(e))
+                else:
+                    QMessageBox.warning(None, "Warning", "!!! CSV export failed !!!:\n" + str(e))
 
     def fit_data(self):
         if self.time_series is not None:
@@ -969,6 +980,7 @@ def fit_data(self):
 
             except Exception as e:
                 self.ui.basebar.setText("!!! Fitting failed !!!")
-                QMessageBox.warning(
-                    None, "Warning", "!!! Fitting failed !!!:\n" + str(e)
-                )
+                if self.testing:
+                    print("Warning", "!!! Fitting failed !!!:\n" + str(e))
+                else:
+                    QMessageBox.warning(None, "Warning", "!!! Fitting failed !!!:\n" + str(e))
diff --git a/tests/test_gui.py b/tests/test_gui.py
index 8c0af28..1175e0b 100644
--- a/tests/test_gui.py
+++ b/tests/test_gui.py
@@ -19,6 +19,7 @@ def find_test_video_path():
 def app(qtbot):
     test_app = QApplication.instance() if QApplication.instance() else QApplication([])
     window = MainWindow()
+    window.testing = True
     qtbot.addWidget(window)
     window.hide() 
     return window