diff --git a/IPython/nbconvert/transformers/tests/test_coalescestreams.py b/IPython/nbconvert/transformers/tests/test_coalescestreams.py
index 7dc9be2..c33ce86 100644
--- a/IPython/nbconvert/transformers/tests/test_coalescestreams.py
+++ b/IPython/nbconvert/transformers/tests/test_coalescestreams.py
@@ -27,7 +27,10 @@ class TestCoalesceStreams(TransformerTestsBase):
 
     def test_coalesce_streams(self):
         """coalesce_streams transformer output test"""
-        nb, res = coalesce_streams(self.build_notebook(), self.build_resources())
+        nb = self.build_notebook()
+        res = self.build_resources()
+        nb, res = transformer(nb, res)
+        nb, res = coalesce_streams(nb, res)
         outputs = nb.worksheets[0].cells[0].outputs
         self.assertEqual(outputs[0].text, "a")
         self.assertEqual(outputs[1].output_type, "text")
diff --git a/IPython/nbconvert/transformers/tests/test_csshtmlheader.py b/IPython/nbconvert/transformers/tests/test_csshtmlheader.py
index 6183e12..709e3af 100644
--- a/IPython/nbconvert/transformers/tests/test_csshtmlheader.py
+++ b/IPython/nbconvert/transformers/tests/test_csshtmlheader.py
@@ -40,6 +40,9 @@ class TestCSSHTMLHeader(TransformerTestsBase):
 
     def test_output(self):
         """Test the output of the CSSHTMLHeaderTransformer"""
-        nb, res = self.build_transformer()(self.build_notebook(), self.build_resources())
+        nb = self.build_notebook()
+        res = self.build_resources()
+        transformer = self.build_transformer()
+        nb, res = transformer(nb, res)
         assert 'inlining' in res
         assert 'css' in res['inlining'] 
\ No newline at end of file
diff --git a/IPython/nbconvert/transformers/tests/test_extractoutput.py b/IPython/nbconvert/transformers/tests/test_extractoutput.py
index 58dcf27..21f93e6 100644
--- a/IPython/nbconvert/transformers/tests/test_extractoutput.py
+++ b/IPython/nbconvert/transformers/tests/test_extractoutput.py
@@ -40,7 +40,10 @@ class TestExtractOutput(TransformerTestsBase):
 
     def test_output(self):
         """Test the output of the ExtractOutputTransformer"""
-        nb, res = self.build_transformer()(self.build_notebook(), self.build_resources())
+        nb = self.build_notebook()
+        res = self.build_resources()
+        transformer = self.build_transformer()
+        nb, res = transformer(nb, res)
 
         # Check if text was extracted.
         assert 'text_filename' in nb.worksheets[0].cells[0].outputs[1]
diff --git a/IPython/nbconvert/transformers/tests/test_latex.py b/IPython/nbconvert/transformers/tests/test_latex.py
index 663e8b6..ab0b274 100644
--- a/IPython/nbconvert/transformers/tests/test_latex.py
+++ b/IPython/nbconvert/transformers/tests/test_latex.py
@@ -39,7 +39,10 @@ class TestLatex(TransformerTestsBase):
 
     def test_output(self):
         """Test the output of the LatexTransformer"""
-        nb, res = self.build_transformer()(self.build_notebook(), self.build_resources())
+        nb = self.build_notebook()
+        res = self.build_resources()
+        transformer = self.build_transformer()
+        nb, res = transformer(nb, res)
 
         # Make sure the code cell wasn't modified.
         self.assertEqual(nb.worksheets[0].cells[0].input, '$ e $')
diff --git a/IPython/nbconvert/transformers/tests/test_revealhelp.py b/IPython/nbconvert/transformers/tests/test_revealhelp.py
index 87b797a..126564e 100644
--- a/IPython/nbconvert/transformers/tests/test_revealhelp.py
+++ b/IPython/nbconvert/transformers/tests/test_revealhelp.py
@@ -60,14 +60,20 @@ class Testrevealhelp(TransformerTestsBase):
 
     def test_reveal_attribute(self):
         """Make sure the reveal url_prefix resources is set"""
-        nb, res = self.build_transformer()(self.build_notebook(), self.build_resources())
+        nb = self.build_notebook()
+        res = self.build_resources()
+        transformer = self.build_transformer()
+        nb, res = transformer(nb, res)
         assert 'reveal' in res
         assert  'url_prefix' in res['reveal']
 
 
     def test_reveal_output(self):
         """Make sure that the reveal transformer """
-        nb, res = self.build_transformer()(self.build_notebook(), self.build_resources())
+        nb = self.build_notebook()
+        res = self.build_resources()
+        transformer = self.build_transformer()
+        nb, res = transformer(nb, res)
         cells = nb.worksheets[0].cells
         
         # Make sure correct metadata tags are available on every cell.
diff --git a/IPython/nbconvert/transformers/tests/test_sphinx.py b/IPython/nbconvert/transformers/tests/test_sphinx.py
index f66b4a6..610c246 100644
--- a/IPython/nbconvert/transformers/tests/test_sphinx.py
+++ b/IPython/nbconvert/transformers/tests/test_sphinx.py
@@ -41,7 +41,10 @@ class TestSphinx(TransformerTestsBase):
     def test_resources(self):
         """Make sure the SphinxTransformer adds the appropriate resources to the
         resources dict."""
-        nb, res = self.build_transformer()(self.build_notebook(), self.build_resources())
+        nb = self.build_notebook()
+        res = self.build_resources()
+        transformer = self.build_transformer()
+        nb, res = transformer(nb, res)
         assert 'sphinx' in res
         assert "author" in res['sphinx']
         assert "version" in res['sphinx']
diff --git a/IPython/nbconvert/transformers/tests/test_svg2pdf.py b/IPython/nbconvert/transformers/tests/test_svg2pdf.py
index a008981..3914b54 100644
--- a/IPython/nbconvert/transformers/tests/test_svg2pdf.py
+++ b/IPython/nbconvert/transformers/tests/test_svg2pdf.py
@@ -78,10 +78,13 @@ class Testsvg2pdf(TransformerTestsBase):
     def test_constructor(self):
         """Can a SVG2PDFTransformer be constructed?"""
         self.build_transformer()
-        
+
 
     @dec.onlyif_cmds_exist('inkscape')
     def test_output(self):
         """Test the output of the SVG2PDFTransformer"""
-        nb, res = self.build_transformer()(self.build_notebook(), self.build_resources())
+        nb = self.build_notebook()
+        res = self.build_resources()
+        transformer = self.build_transformer()
+        nb, res = transformer(nb, res)
         assert 'svg' in nb.worksheets[0].cells[0].outputs[0]