diff --git a/recipe_modules/infra_paths/api.py b/recipe_modules/infra_paths/api.py
index c84928c4f..1b902826f 100644
--- a/recipe_modules/infra_paths/api.py
+++ b/recipe_modules/infra_paths/api.py
@@ -3,6 +3,7 @@
 # found in the LICENSE file.
 
 from recipe_engine import recipe_api
+from recipe_engine.config_types import Path, NamedBasePath
 
 
 class InfraPathsApi(recipe_api.RecipeApi):
@@ -28,6 +29,10 @@ class InfraPathsApi(recipe_api.RecipeApi):
     else:
       self.set_config('buildbot')
 
+    for path in self._test_data.get('exists', []):
+      assert isinstance(path.base, NamedBasePath)
+      self.m.path.mock_add_paths(self[path.base.name].join(*path.pieces))
+
   def __getitem__(self, name):
     self._lazy_set_config()
     return self.c.paths[name]
diff --git a/recipe_modules/infra_paths/example.expected/linux.json b/recipe_modules/infra_paths/example.expected/linux.json
index 9ec0cb6ce..98dba8c96 100644
--- a/recipe_modules/infra_paths/example.expected/linux.json
+++ b/recipe_modules/infra_paths/example.expected/linux.json
@@ -4,6 +4,10 @@
     "cwd": "[CWD]",
     "name": "step"
   },
+  {
+    "cmd": [],
+    "name": "path exists"
+  },
   {
     "name": "$result",
     "recipe_result": null,
diff --git a/recipe_modules/infra_paths/example.expected/mac.json b/recipe_modules/infra_paths/example.expected/mac.json
index 9ec0cb6ce..98dba8c96 100644
--- a/recipe_modules/infra_paths/example.expected/mac.json
+++ b/recipe_modules/infra_paths/example.expected/mac.json
@@ -4,6 +4,10 @@
     "cwd": "[CWD]",
     "name": "step"
   },
+  {
+    "cmd": [],
+    "name": "path exists"
+  },
   {
     "name": "$result",
     "recipe_result": null,
diff --git a/recipe_modules/infra_paths/example.expected/win.json b/recipe_modules/infra_paths/example.expected/win.json
index 9ec0cb6ce..98dba8c96 100644
--- a/recipe_modules/infra_paths/example.expected/win.json
+++ b/recipe_modules/infra_paths/example.expected/win.json
@@ -4,6 +4,10 @@
     "cwd": "[CWD]",
     "name": "step"
   },
+  {
+    "cmd": [],
+    "name": "path exists"
+  },
   {
     "name": "$result",
     "recipe_result": null,
diff --git a/recipe_modules/infra_paths/example.py b/recipe_modules/infra_paths/example.py
index 9e6f712fa..f55bf058b 100644
--- a/recipe_modules/infra_paths/example.py
+++ b/recipe_modules/infra_paths/example.py
@@ -4,6 +4,7 @@
 
 DEPS = [
   'infra_paths',
+  'recipe_engine/path',
   'recipe_engine/platform',
   'recipe_engine/properties',
   'recipe_engine/step',
@@ -14,10 +15,16 @@ from recipe_engine.config_types import Path
 def RunSteps(api):
   api.step('step', [], cwd=api.infra_paths['slave_build'])
 
+  if api.path.exists(api.infra_paths['slave_build'].join('foo.txt')):
+    api.step('path exists', [])
+
 
 def GenTests(api):
   for platform in ('linux', 'win', 'mac'):
-    yield (api.test(platform) + api.platform.name(platform))
+    yield (api.test(platform) +
+           api.platform.name(platform) +
+           api.infra_paths.exists(
+               api.infra_paths['slave_build'].join('foo.txt')))
 
     yield (api.test('%s_kitchen' % platform) +
            api.platform.name(platform) +
diff --git a/recipe_modules/infra_paths/test_api.py b/recipe_modules/infra_paths/test_api.py
new file mode 100644
index 000000000..a5bbb9ae4
--- /dev/null
+++ b/recipe_modules/infra_paths/test_api.py
@@ -0,0 +1,16 @@
+# Copyright 2016 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+from recipe_engine import recipe_test_api
+from recipe_engine.config_types import Path, NamedBasePath
+
+class InfraPathsTestApi(recipe_test_api.RecipeTestApi):
+  @recipe_test_api.mod_test_data
+  @staticmethod
+  def exists(*paths):
+    assert all(isinstance(p, Path) for p in paths)
+    return paths
+
+  def __getitem__(self, name):
+    return Path(NamedBasePath(name))