diff --git a/config/machine_settings/st-ten-6.ini b/config/machine_settings/st-ten-6.ini
index cc204dd..98711e6 100644
--- a/config/machine_settings/st-ten-6.ini
+++ b/config/machine_settings/st-ten-6.ini
@@ -73,10 +73,12 @@ filling_time: 15
 settling_time: 10
 settling_pressure_min_percent: 5
 settling_pressure_max_percent: 5
-test_time: 10
-test_pressure_min_delta: 35
 test_pressure: 15000
-test_pressure_max_delta: 5
+test_time: 10
+test_pressure_min_delta: 35 # MAXIMUM LEAK ACCEPTED WITH REF LEAK INSERTED
+test_pressure_max_delta: -25 # MINIMUM LEAK ACCEPTED WITH REF LEAK INSERTED
+test_pressure_tt_min_delta: -5 #MAXIMUM LEAK ACCEPTED WITH TUBE-TUBE
+test_pressure_tt_max_delta: 5 #MINIMUM LEAK ACCEPTED TUBE-TUBE
 flush_time: 1
 flush_pressure: 100
 relay_config: 1
\ No newline at end of file
diff --git a/src/ui/test/test.py b/src/ui/test/test.py
index b86a50b..a5693d9 100755
--- a/src/ui/test/test.py
+++ b/src/ui/test/test.py
@@ -351,6 +351,7 @@ class Test(Widget):
             self.cycle_steps = steps
             self.check_steps_dependencies(self.cycle_steps)
             leak_autotest_steps=[]
+            # CONFIGURE LEAK AUTOTEST PARAMETERS
             if self.config["autotest_leak"]["enabled"]=="true":
                 l_at_1=copy.deepcopy(self.config["autotest_leak"])
                 l_at_1.pop("enabled")
@@ -359,6 +360,8 @@ class Test(Widget):
                 l_at_2=copy.deepcopy(self.config["autotest_leak"])
                 l_at_2.pop("enabled")
                 l_at_2={a: float(x) for a, x in l_at_2.items()}
+                l_at_2["test_pressure_min_delta"]=l_at_2["test_pressure_tt_min_delta"]
+                l_at_2["test_pressure_max_delta"]=l_at_2["test_pressure_tt_max_delta"]
                 l_at_2["autotest"]="ok_check"
                 leak_autotest_steps=[Steps(type="leak_1",spec=l_at_1),Steps(type="leak_1",spec=l_at_2)]
 
diff --git a/src/ui/test_leak/test_leak.py b/src/ui/test_leak/test_leak.py
index 33f7e4f..37c3c34 100644
--- a/src/ui/test_leak/test_leak.py
+++ b/src/ui/test_leak/test_leak.py
@@ -122,7 +122,7 @@ class Test_Leak(Test_Test):
             if  step == "ok_check":
                 ok = type(result) is str and "passed" in result.lower() # AUTOTEST - NO LEAK
             elif  step == "ko_check":
-                ok = type(result) is str and "failed" in result.lower() # AUTOTEST - LEAK
+                ok = type(result) is str and "passed" in result.lower() # AUTOTEST - LEAK
             else:
                 ok = type(result) is str and "passed" in result.lower() # NORMAL TEST
 
@@ -181,6 +181,9 @@ class Test_Leak(Test_Test):
                 if self.parent_assembly_widget is not None:
                     self.parent_assembly_widget().set_text(text="COLLEGARE GLI ATTACCHI PNEUMATICI E PREMERE START PER INIZIARE LA PROVA TENUTA")
             self.start_b.setEnabled(True)
+            self.start_b.setDefault(True)
+            self.start_b.setFocus()
+
             self.stop_b.setEnabled(False)
         else:
             if self.step is not None:
diff --git a/src/ui/test_leak/test_leak.ui b/src/ui/test_leak/test_leak.ui
index 23dfb7e..a9844d9 100644
--- a/src/ui/test_leak/test_leak.ui
+++ b/src/ui/test_leak/test_leak.ui
@@ -1503,6 +1503,15 @@
      <property name="text">
       <string>START</string>
      </property>
+     <property name="autoDefault">
+      <bool>false</bool>
+     </property>
+     <property name="default">
+      <bool>false</bool>
+     </property>
+     <property name="flat">
+      <bool>false</bool>
+     </property>
     </widget>
    </item>
    <item row="16" column="0" colspan="3">