diff --git a/.travis.yml b/.travis.yml
index 6bb9f5a..9428fac 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,10 +1,14 @@
 language: python
 
 python:
-- 2.7
+- 3.4
 
-install:
-pip install --user -r requirements.txt
+os: linux
+dist: xenial
+
+before_install:
+- sudo apt-get install -y python-qt4
+- sudo pip install pytest-qt
 
 script:
 - pytest
diff --git a/equations.py b/equations.py
index 0016e53..a05e19e 100755
--- a/equations.py
+++ b/equations.py
@@ -1187,7 +1187,7 @@ def prepareTextPuzzle(self, maxValue):
         # TODO: Add unit test , mandatory
         # Stephany has... 
         relations = {"three more than": (1,3) ,"two more than": (1,2) ,"one more than" : (1,1), "one less than" : (1,-1), "two less than" : (1,-2), "three less than" : (1,-3), "twice as much as" : (2,0), "half of what" : (0.5, 0)} 
-        relation = random.choice(relations.keys())
+        relation = random.choice(list(relations.keys()))
         kasia_items, sum_items = self.computeAnswerAndTotal(relations[relation],maxValue)
         return relation, kasia_items, sum_items 
 
@@ -1274,11 +1274,11 @@ def makeDescriptionOfTextPuzzle(self,sumItems, relationText):
     def makeDescriptionOfBuyingPuzzle(self,item, zlotys, groszys):
         items = item + "s"
         price = ""
-        if zlotys <> "0":
+        if zlotys is not "0":
             price += zlotys+ " dollars "
 
-        if groszys <> "0":
-            if zlotys <> "0":
+        if groszys is not "0":
+            if zlotys is not "0":
                 price += "and "
             price += groszys+ " cents "
         self.price = "= "+str(zlotys)+"."+str(groszys)+" $"
@@ -1344,6 +1344,6 @@ def makeMazeSpeech(self):
                             config.getMaximumBears(),       # some initialization has to be done
                             config.getContent())       
     else:
-        print "Daily limit exhausted" 
+        print("Daily limit exhausted")
         stop = Stop(args)    
     sys.exit(app.exec_())
diff --git a/requirements.txt b/requirements.txt
deleted file mode 100644
index ecf3e95..0000000
--- a/requirements.txt
+++ /dev/null
@@ -1 +0,0 @@
-PyQt4
diff --git a/test_equations.py b/test_equations.py
index a5b3b5d..7f81a97 100644
--- a/test_equations.py
+++ b/test_equations.py
@@ -100,10 +100,6 @@ def testCalculateSectorIndex(qtbot):
    assert(equations.Maze(4,3).calculateSectorIndex(0,4) == "none")
 
 def testMaze(qtbot):
-#    testMaze = equations.Maze(3,3)    
-#    qtbot.addWidget(testMaze)
-#    testMaze.show()
-#    time.sleep(1)
     class Args():
         def __init__(self):
             self.dry_run = "Test"
@@ -111,12 +107,12 @@ def __init__(self):
     testStop = equations.Stop(args) 
     testStop.show()
     qtbot.addWidget(testStop)
-#    qtbot.waitExposed(testStop,1000)
     qtbot.waitForWindowShown(testStop)
     return
 
 def testClearSectors(qtbot):
     testMaze = equations.Maze(3,3)    
+    qtbot.addWidget(testMaze)
     refTestMaze = equations.Maze(3,3)    
     assert(refTestMaze.width == 3) 
     assert(refTestMaze.height == 3)