Fix inadvertantly persistent test artifacts

tests/test_flows_seed.py

@@ -61,7 +61,6 @@ class TestSeedFlows(FlowTest):
             the SeedOptionsView.
         """
         def test_with_mnemonic(mnemonic):
-            Settings.HOSTNAME = "not seedsigner-os"
             sequence = [
                 FlowStep(MainMenuView, button_data_selection=MainMenuView.SEEDS),
                 FlowStep(seed_views.SeedsMenuView, is_redirect=True),  # When no seeds are loaded it auto-redirects to LoadSeedView
@@ -128,7 +127,6 @@ class TestSeedFlows(FlowTest):
             Most BIP-39 mnemonics should generate an error if entered as Electrum seeds.
         """
         def test_with_mnemonic(mnemonic: list[str], custom_extension: str = None, expects_electrum_seed_is_valid: bool = True):
-            Settings.HOSTNAME = "not seedsigner-os"
             settings = Settings.get_instance()
             settings.set_value(SettingsConstants.SETTING__ELECTRUM_SEEDS, SettingsConstants.OPTION__ENABLED)
 

tests/test_flows_view.py

@@ -30,13 +30,13 @@ class TestViewFlows(FlowTest):
         """
         Basic flow from MainMenuView to PowerOffView
         """
-        Settings.HOSTNAME = Settings.SEEDSIGNER_OS
-        self.run_sequence([
-            FlowStep(MainMenuView, screen_return_value=RET_CODE__POWER_BUTTON),
-            FlowStep(PowerOptionsView, button_data_selection=PowerOptionsView.POWER_OFF),
-            FlowStep(PowerOffView),  # returns BackStackView
-            FlowStep(PowerOptionsView),
-        ])
+        with patch.object(Settings, 'HOSTNAME', return_value=Settings.SEEDSIGNER_OS):
+            self.run_sequence([
+                FlowStep(MainMenuView, screen_return_value=RET_CODE__POWER_BUTTON),
+                FlowStep(PowerOptionsView, button_data_selection=PowerOptionsView.POWER_OFF),
+                FlowStep(PowerOffView),  # returns BackStackView
+                FlowStep(PowerOptionsView),
+            ])
 
 
     def test_not_yet_implemented_flow(self):