diff --git a/pymath/calculus/test/test_render.py b/pymath/calculus/test/test_render.py
index f7ebc8b..923366e 100644
--- a/pymath/calculus/test/test_render.py
+++ b/pymath/calculus/test/test_render.py
@@ -38,6 +38,9 @@ class TestTexRender(unittest.TestCase):
     def test_type_render_str(self):
         self.assertEqual(tex(["a"]), "a")
 
+    def test_type_render_float(self):
+        self.assertEqual(tex([12.345]), "12.345")
+
     def test_type_render_fraction(self):
         self.assertEqual(tex([Fraction(1, 2)]), "\\frac{ 1 }{ 2 }")
 
@@ -214,6 +217,9 @@ class TesttxtRender(unittest.TestCase):
     def test_type_render_str(self):
         self.assertEqual(txt(["a"]), "a")
 
+    def test_type_render_float(self):
+        self.assertEqual(txt([12.345]), "12.345")
+
     def test_type_render_fraction(self):
         self.assertEqual(txt([Fraction(1, 2)]), "1 / 2")
 
diff --git a/pymath/calculus/test/test_str2tokens.py b/pymath/calculus/test/test_str2tokens.py
index db26034..f080cdc 100644
--- a/pymath/calculus/test/test_str2tokens.py
+++ b/pymath/calculus/test/test_str2tokens.py
@@ -18,6 +18,9 @@ class TestStr2tokens(unittest.TestCase):
         ans = str2in_tokens("2*3+4")
         self.assertEqual(ans, [2, "*", 3, "+", 4])
 
+        ans = str2in_tokens("2.34")
+        self.assertEqual(ans, [2.34])
+
     def test_in2post_fix(self):
         in_tokens = str2in_tokens("2+3*4")
         ans = in2post_fix(in_tokens)
@@ -27,8 +30,6 @@ class TestStr2tokens(unittest.TestCase):
         ans = in2post_fix(in_tokens)
         self.assertEqual(ans, [2, 3, "*", 4, "+"])
 
-        # TODO: Ajouter des tests pour les cas particuliers... |sam. nov.  8
-        # 17:39:18 CET 2014
     def test_str2in_tokens_big_num(self):
         exp = "123 + 3"
         tok = str2in_tokens(exp)
@@ -65,10 +66,6 @@ class TestStr2tokens(unittest.TestCase):
         tok = str2in_tokens(exp)
         self.assertEqual(tok, [-3, "*", "(", 2, ")"])
 
-    def test_str2tokens_error_float(self):
-        exp = "1 + 1.3"
-        self.assertRaises(ValueError, str2tokens, exp)
-
     def test_str2tokens_error(self):
         exp = "1 + $"
         self.assertRaises(ValueError, str2tokens, exp)