diff --git a/lib/galaxy/tools/parameters/__init__.py b/lib/galaxy/tools/parameters/__init__.py
index 0e2e51af2c7..a2d0a407595 100644
--- a/lib/galaxy/tools/parameters/__init__.py
+++ b/lib/galaxy/tools/parameters/__init__.py
@@ -24,7 +24,7 @@ def visit_input_values( inputs, input_values, callback, name_prefix='', label_pr
     >>> from xml.etree.ElementTree import XML
     >>> from galaxy.util.bunch import Bunch
     >>> from galaxy.util.odict import odict
-    >>> from galaxy.tools.parameters.basic import TextToolParameter
+    >>> from galaxy.tools.parameters.basic import TextToolParameter, BooleanToolParameter
     >>> from galaxy.tools.parameters.grouping import Repeat
     >>> a = TextToolParameter( None, XML( '<param name="a"/>' ) )
     >>> b = Repeat()
@@ -32,7 +32,7 @@ def visit_input_values( inputs, input_values, callback, name_prefix='', label_pr
     >>> d = Repeat()
     >>> e = TextToolParameter( None, XML( '<param name="e"/>' ) )
     >>> f = Conditional()
-    >>> g = TextToolParameter( None, XML( '<param name="g"/>' ) )
+    >>> g = BooleanToolParameter( None, XML( '<param name="g"/>' ) )
     >>> h = TextToolParameter( None, XML( '<param name="h"/>' ) )
     >>> i = TextToolParameter( None, XML( '<param name="i"/>' ) )
     >>> b.name = 'b'
@@ -45,12 +45,16 @@ def visit_input_values( inputs, input_values, callback, name_prefix='', label_pr
     >>>
     >>> def visitor( input, value, prefix, prefixed_name, **kwargs ):
     ...     print 'name=%s, prefix=%s, prefixed_name=%s, value=%s' % ( input.name, prefix, prefixed_name, value )
-    >>> visit_input_values( odict([('a',a),('b',b)]), odict([ ('a', 1), ('b', [ odict([('c', 3), ( 'd', [odict([ ('e',5), ('f', odict([ ('g','true'), ('h',7) ])) ]) ])]) ]) ]), visitor )
+    >>> inputs = odict([('a',a),('b',b)])
+    >>> nested = odict([ ('a', 1), ('b', [ odict([('c', 3), ( 'd', [odict([ ('e', 5), ('f', odict([ ('g', True), ('h', 7) ])) ]) ])]) ]) ])
+    >>> visit_input_values( inputs, nested, visitor )
     name=a, prefix=, prefixed_name=a, value=1
     name=c, prefix=b_0|, prefixed_name=b_0|c, value=3
     name=e, prefix=b_0|d_0|, prefixed_name=b_0|d_0|e, value=5
-    name=g, prefix=b_0|d_0|, prefixed_name=b_0|d_0|f|g, value=true
+    name=g, prefix=b_0|d_0|, prefixed_name=b_0|d_0|f|g, value=True
     name=h, prefix=b_0|d_0|, prefixed_name=b_0|d_0|f|h, value=7
+    >>> params_from_strings( inputs, params_to_strings( inputs, nested, None ), None )[ 'b' ][ 0 ][ 'd' ][ 0 ][ 'f' ][ 'g' ] is True
+    True
     """
     def callback_helper( input, input_values, name_prefix, label_prefix, parent_prefix, context=None, error=None ):
         args = {