diff --git a/jedi/evaluate/precedence.py b/jedi/evaluate/precedence.py
index 7e054c05..54973777 100644
--- a/jedi/evaluate/precedence.py
+++ b/jedi/evaluate/precedence.py
@@ -4,7 +4,6 @@ Handles operator precedence.
 import operator as op
 
 from jedi._compatibility import unicode
-from jedi import debug
 from jedi.evaluate.compiled import CompiledObject, create, builtin_from_name
 from jedi.evaluate import analysis
 from jedi.evaluate.context import ContextSet, NO_CONTEXTS, iterator_to_context_set
@@ -37,34 +36,6 @@ def literals_to_types(evaluator, result):
     return new_result
 
 
-def calculate_children(evaluator, context, children):
-    """
-    Calculate a list of children with operators.
-    """
-    iterator = iter(children)
-    types = context.eval_node(next(iterator))
-    for operator in iterator:
-        right = next(iterator)
-        if operator.type == 'comp_op':  # not in / is not
-            operator = ' '.join(c.value for c in operator.children)
-
-        # handle lazy evaluation of and/or here.
-        if operator in ('and', 'or'):
-            left_bools = set(left.py__bool__() for left in types)
-            if left_bools == set([True]):
-                if operator == 'and':
-                    types = context.eval_node(right)
-            elif left_bools == set([False]):
-                if operator != 'and':
-                    types = context.eval_node(right)
-            # Otherwise continue, because of uncertainty.
-        else:
-            types = calculate(evaluator, context, types, operator,
-                              context.eval_node(right))
-    debug.dbg('calculate_children types %s', types)
-    return types
-
-
 def calculate(evaluator, context, left_contexts, operator, right_contexts):
     if not left_contexts or not right_contexts:
         # illegal slices e.g. cause left/right_result to be None
diff --git a/jedi/evaluate/syntax_tree.py b/jedi/evaluate/syntax_tree.py
index 240a1b14..84b6c0bf 100644
--- a/jedi/evaluate/syntax_tree.py
+++ b/jedi/evaluate/syntax_tree.py
@@ -107,7 +107,7 @@ def eval_node(context, element):
     elif typ == 'annassign':
         return pep0484._evaluate_for_annotation(context, element.children[1])
     else:
-        return precedence.calculate_children(evaluator, context, element.children)
+        return eval_or_test(context, element)
 
 
 def eval_trailer(context, base_contexts, trailer):
@@ -255,3 +255,28 @@ def _eval_expr_stmt(context, stmt, seek_name=None):
             context_set = precedence.calculate(context.evaluator, context, left, operator, context_set)
     debug.dbg('eval_expr_stmt result %s', context_set)
     return context_set
+
+
+def eval_or_test(context, or_test):
+    iterator = iter(or_test.children)
+    types = context.eval_node(next(iterator))
+    for operator in iterator:
+        right = next(iterator)
+        if operator.type == 'comp_op':  # not in / is not
+            operator = ' '.join(c.value for c in operator.children)
+
+        # handle lazy evaluation of and/or here.
+        if operator in ('and', 'or'):
+            left_bools = set(left.py__bool__() for left in types)
+            if left_bools == set([True]):
+                if operator == 'and':
+                    types = context.eval_node(right)
+            elif left_bools == set([False]):
+                if operator != 'and':
+                    types = context.eval_node(right)
+            # Otherwise continue, because of uncertainty.
+        else:
+            types = precedence.calculate(context.evaluator, context, types, operator,
+                                         context.eval_node(right))
+    debug.dbg('calculate_children types %s', types)
+    return types