diff --git a/src/unimacro/natlinkutilsbj.py b/src/unimacro/natlinkutilsbj.py
index 65153e5..e1afd0b 100644
--- a/src/unimacro/natlinkutilsbj.py
+++ b/src/unimacro/natlinkutilsbj.py
@@ -358,7 +358,7 @@ def GetGrammarObject(self, grammarName):
             return self.allGrammarXObjects[grammarName]
         return None
 
-    def  ControlResetExclusiveGrammar(self):
+    def ControlResetExclusiveGrammar(self):
         """resets the exclusive flag of the _control grammar
     
         If the exclusive state of a/the last grammar is reset (becoming
@@ -392,7 +392,6 @@ def ControlSetExclusiveGrammar(self, value):
         In this way, the commands of the _control grammar remain accessible when
         other (Unimacro) grammars are exclusive
         """
-        value = value or 1
         exclGr = self.getExclusiveGrammars()
         if not exclGr:
             return
@@ -400,7 +399,7 @@ def ControlSetExclusiveGrammar(self, value):
             return
         if self.LoadedControlGrammars[0] is self:
             return
-        self.LoadedControlGrammars[0].setExclusive(1)
+        self.LoadedControlGrammars[0].setExclusive(value)
 
 
     def getRegisteredGrammarNames(self):
@@ -531,9 +530,11 @@ def setExclusive(self,exclusive):
         self.__inherited.setExclusive(self,exclusive)
         self.exclusive = exclusive
         
-        if self.LoadedControlGrammars and self is self.LoadedControlGrammars[0]:
-            return
-        self.ControlSetExclusiveGrammar(exclusive)
+        if self.LoadedControlGrammars:
+            if self is self.LoadedControlGrammars[0]:
+                # no extra setting if self is _control
+                return
+            self.ControlSetExclusiveGrammar(exclusive)
        
 
     def cancelMode(self):
diff --git a/tests/test_grammar_control.py b/tests/test_grammar_control.py
index 7898857..2bd2c91 100644
--- a/tests/test_grammar_control.py
+++ b/tests/test_grammar_control.py
@@ -39,7 +39,7 @@ def rule_gramoff(self, words):
         """grammar off"""
         print(f'got gramoff: {words}')
         
-def tttest_getAllGrammars(unimacro_setup):
+def test_getAllGrammars(unimacro_setup):
     """see if we can get all the grammars
     """
     gramon = GramOn(inifile_stem="_gramon")
@@ -110,6 +110,8 @@ def test_ExclusiveMode(unimacro_setup):
     gramon.initialize()
     gramoff = GramOff(inifile_stem="_gramoff")
     gramoff.initialize()
+    # just to be sure (should have been done when unloading _control (utilGrammar))
+    gramon.UnregisterControlObject()
     assert gramon.isLoaded() is True
     assert gramon.isActive() is True
     assert gramoff.isLoaded() is False
@@ -118,7 +120,7 @@ def test_ExclusiveMode(unimacro_setup):
     gramon.setExclusive(1)
     # set exclusive 
     gramon.setExclusive(1)
-    exclGr = gramon.getExclusiveGrammars()
+    exclGr = gramon.getExclusiveGrammars() 
     assert len(exclGr) == 1
     gramon.setExclusive(0)
     exclGr = gramon.getExclusiveGrammars()
@@ -150,7 +152,7 @@ def test_ExclusiveMode(unimacro_setup):
     
     
 
-def tttest_show_all_grammars(unimacro_setup):
+def test_show_all_grammars(unimacro_setup):
     gramon = GramOn(inifile_stem="_gramon")
     gramon.initialize()
     gramoff = GramOff(inifile_stem="_gramoff")