diff --git a/bravado_core/model.py b/bravado_core/model.py
index ca6b615f..a662fbcf 100644
--- a/bravado_core/model.py
+++ b/bravado_core/model.py
@@ -770,28 +770,63 @@ def descend(fragment, json_reference=None):
 
 def _run_post_processing(spec):
     visited_models = {}
-    # Discover all the models
-    _post_process_spec(
-        spec_dict=spec.spec_dict,
-        spec_resolver=spec.resolver,
-        on_container_callbacks=[
-            functools.partial(
-                _tag_models,
-                visited_models=visited_models,
-                swagger_spec=spec,
-            ),
-            functools.partial(
-                _bless_models,
-                visited_models=visited_models,
-                swagger_spec=spec,
-            ),
-            functools.partial(
-                _collect_models,
-                models=spec.definitions,
-                swagger_spec=spec,
-            ),
-        ],
-    )
+
+    def _call_post_process_spec(spec_dict):
+        # Discover all the models in spec_dict
+        _post_process_spec(
+            spec_dict=spec_dict,
+            spec_resolver=spec.resolver,
+            on_container_callbacks=[
+                functools.partial(
+                    _tag_models,
+                    visited_models=visited_models,
+                    swagger_spec=spec,
+                ),
+                functools.partial(
+                    _bless_models,
+                    visited_models=visited_models,
+                    swagger_spec=spec,
+                ),
+                functools.partial(
+                    _collect_models,
+                    models=spec.definitions,
+                    swagger_spec=spec,
+                ),
+            ],
+        )
+
+    # Post process specs to identify models
+    _call_post_process_spec(spec.spec_dict)
+
+    processed_uris = {
+        uri
+        for uri in spec.resolver.store
+        if uri == spec.origin_url or re.match(r'http://json-schema.org/draft-\d+/schema', uri)
+    }
+    additional_uri = _get_unprocessed_uri(spec, processed_uris)
+    while additional_uri:
+        # Post process each referenced specs to identify models in definitions of linked files
+        with spec.resolver.in_scope(additional_uri):
+            _call_post_process_spec(
+                spec.resolver.store[additional_uri],
+            )
+
+        processed_uris.add(additional_uri)
+        additional_uri = _get_unprocessed_uri(spec, processed_uris)
+
+
+def _get_unprocessed_uri(swagger_spec, processed_uris):
+    """
+    Retrieve an un-process URI from swagger spec referred URIs
+
+    :type swagger_spec: bravado_core.spec.Spec
+    :param processed_uris: URIs of the already processed URIs
+
+    :rtype: str
+    """
+    for uri in swagger_spec.resolver.store:
+        if uri not in processed_uris:
+            return uri
 
 
 def model_discovery(swagger_spec):
diff --git a/test-data/2.0/multi-file-recursive/aux.json b/test-data/2.0/multi-file-recursive/aux.json
index 8c08cc2e..fbf9f02f 100644
--- a/test-data/2.0/multi-file-recursive/aux.json
+++ b/test-data/2.0/multi-file-recursive/aux.json
@@ -17,6 +17,11 @@
         },
         "not_used_remote_reference": {
             "type": "object",
+            "properties": {
+                "random_number": {
+                    "$ref": "aux_2.json#/definitions/random_integer"
+                }
+            },
             "x-model": "not_used_remote_reference"
         }
     },
diff --git a/test-data/2.0/multi-file-recursive/aux_2.json b/test-data/2.0/multi-file-recursive/aux_2.json
new file mode 100644
index 00000000..09a7381f
--- /dev/null
+++ b/test-data/2.0/multi-file-recursive/aux_2.json
@@ -0,0 +1,21 @@
+{
+    "definitions": {
+        "not_referenced_models_in_not_direcly_linked_file": {
+            "type": "object"
+        },
+        "random_integer": {
+            "type": "object",
+            "properties": {
+                "value": {
+                    "type": "integer"
+                },
+                "min-value": {
+                    "type": "integer"
+                },
+                "max-value": {
+                    "type": "integer"
+                }
+            }
+        }
+    }
+}
diff --git a/test-data/2.0/multi-file-recursive/flattened-multi-file-recursive-spec.json b/test-data/2.0/multi-file-recursive/flattened-multi-file-recursive-spec.json
index b4b4129b..c4140d15 100644
--- a/test-data/2.0/multi-file-recursive/flattened-multi-file-recursive-spec.json
+++ b/test-data/2.0/multi-file-recursive/flattened-multi-file-recursive-spec.json
@@ -1,6 +1,11 @@
 {
   "definitions": {
     "lfile:aux.json|..definitions..not_used_remote_reference": {
+      "properties": {
+        "random_number": {
+          "$ref": "#/definitions/lfile:aux_2.json|..definitions..random_integer"
+        }
+      },
       "type": "object",
       "x-model": "not_used_remote_reference"
     },
@@ -19,6 +24,25 @@
       "type": "object",
       "x-model": "ping"
     },
+    "lfile:aux_2.json|..definitions..not_referenced_models_in_not_direcly_linked_file": {
+      "type": "object",
+      "x-model": "not_referenced_models_in_not_direcly_linked_file"
+    },
+    "lfile:aux_2.json|..definitions..random_integer": {
+      "properties": {
+        "max-value": {
+          "type": "integer"
+        },
+        "min-value": {
+          "type": "integer"
+        },
+        "value": {
+          "type": "integer"
+        }
+      },
+      "type": "object",
+      "x-model": "random_integer"
+    },
     "lfile:swagger.json|..definitions..model_with_allOf_recursive": {
       "allOf": [
         {
@@ -39,11 +63,6 @@
       "x-model": "model_with_allOf_recursive"
     },
     "lfile:swagger.json|..definitions..not_used": {
-      "properties": {
-        "not_used_remote_reference": {
-          "$ref": "#/definitions/lfile:aux.json|..definitions..not_used_remote_reference"
-        }
-      },
       "type": "object",
       "x-model": "not_used"
     },
diff --git a/test-data/2.0/multi-file-recursive/swagger.json b/test-data/2.0/multi-file-recursive/swagger.json
index 8e920597..adb7a834 100644
--- a/test-data/2.0/multi-file-recursive/swagger.json
+++ b/test-data/2.0/multi-file-recursive/swagger.json
@@ -21,11 +21,6 @@
         },
         "not_used": {
             "type": "object",
-            "properties": {
-                "not_used_remote_reference": {
-                    "$ref": "aux.json#/definitions/not_used_remote_reference"
-                }
-            },
             "x-model": "not_used"
         },
         "pong": {
diff --git a/test-data/2.0/multi-file-specs-with-no-x-model/flattened-multi-file-with-no-xmodel.json b/test-data/2.0/multi-file-specs-with-no-x-model/flattened-multi-file-with-no-xmodel.json
index 07d4e1e4..62b17b74 100644
--- a/test-data/2.0/multi-file-specs-with-no-x-model/flattened-multi-file-with-no-xmodel.json
+++ b/test-data/2.0/multi-file-specs-with-no-x-model/flattened-multi-file-with-no-xmodel.json
@@ -2,7 +2,7 @@
   "definitions": {
     "lfile:aux.json|..definitions..referenced_object": {
       "type": "object",
-      "x-model": "lfile:aux.json|..definitions..referenced_object"
+      "x-model": "referenced_object"
     },
     "lfile:swagger.json|..definitions..object": {
       "properties": {
diff --git a/tests/model/collect_models_test.py b/tests/model/collect_models_test.py
index 90fc8442..4cfe6260 100644
--- a/tests/model/collect_models_test.py
+++ b/tests/model/collect_models_test.py
@@ -19,18 +19,22 @@ def pet_model_spec():
     }
 
 
-def test_simple(minimal_swagger_dict, pet_model_spec):
+@pytest.mark.parametrize(
+    'origin_url', [None, 'origin_url'],
+)
+def test_simple(minimal_swagger_dict, pet_model_spec, origin_url):
     minimal_swagger_dict['definitions']['Pet'] = pet_model_spec
-    swagger_spec = Spec(minimal_swagger_dict)
+    swagger_spec = Spec(minimal_swagger_dict, origin_url=origin_url)
     models = {}
+    json_reference = '{}#/definitions/Pet'.format(origin_url or '')
     _collect_models(
         minimal_swagger_dict['definitions']['Pet'],
         models=models,
         swagger_spec=swagger_spec,
-        json_reference='#/definitions/Pet/x-model',
+        json_reference=json_reference + '/x-model',
     )
     assert 'Pet' in models
-    assert models['Pet']._json_reference == '#/definitions/Pet'
+    assert models['Pet']._json_reference == json_reference
 
 
 def test_no_model_type_generation_for_not_object_type(minimal_swagger_dict):