diff --git a/rest-api-spec/test/explain/10_source_filtering.yaml b/rest-api-spec/test/explain/10_source_filtering.yaml
new file mode 100644
index 00000000000..ecdc7173dfa
--- /dev/null
+++ b/rest-api-spec/test/explain/10_source_filtering.yaml
@@ -0,0 +1,45 @@
+---
+"Source filtering":
+
+  - do:
+      index:
+        index:  test_1
+        type:   test
+        id:     1
+        body:   { "include": { "field1" : "v1", "field2": "v2" }, "count": 1 }
+  - do:
+      indices.refresh:
+        index: test_1
+
+  - do:
+      explain: { index:  test_1, type: test, id: 1, _source: false, body: { query: { match_all: {}} } }
+  - match:   { _index:   test_1  }
+  - match:   { _type:    test    }
+  - match:   { _id:      1       }
+  - is_false:  get._source
+
+  - do:
+      explain: { index:  test_1, type: test, id: 1, _source: true, body: { query: { match_all: {}} } }
+  - match:  { get._source.include.field1: v1 }
+
+  - do:
+      explain: { index:  test_1, type: test, id: 1, _source: include.field1, body: { query: { match_all: {}} } }
+  - match:  { get._source.include.field1: v1 }
+  - is_false: get._source.include.field2
+
+  - do:
+      explain: { index:  test_1, type: test, id: 1, _source_include: include.field1, body: { query: { match_all: {}} } }
+  - match:  { get._source.include.field1: v1 }
+  - is_false: get._source.include.field2
+
+  - do:
+      explain: { index:  test_1, type: test, id: 1, _source_include: "include.field1,include.field2", body: { query: { match_all: {}} } }
+  - match:  { get._source.include.field1: v1 }
+  - match:  { get._source.include.field2: v2 }
+  - is_false: get._source.count
+
+  - do:
+      explain: { index:  test_1, type: test, id: 1, _source_include: include, _source_exclude: "*.field2", body: { query: { match_all: {}} } }
+  - match:  { get._source.include.field1: v1 }
+  - is_false: get._source.include.field2
+  - is_false: get._source.count
diff --git a/rest-api-spec/test/explain/TODO.txt b/rest-api-spec/test/explain/TODO.txt
new file mode 100644
index 00000000000..2362d9df8d4
--- /dev/null
+++ b/rest-api-spec/test/explain/TODO.txt
@@ -0,0 +1,6 @@
+Tests missing for:
+
+- everything :)
+
+
+# preference
diff --git a/rest-api-spec/test/get/20_fields.yaml b/rest-api-spec/test/get/20_fields.yaml
index 6d85c5d86f5..f143b13039f 100644
--- a/rest-api-spec/test/get/20_fields.yaml
+++ b/rest-api-spec/test/get/20_fields.yaml
@@ -20,6 +20,20 @@
   - match:   { fields.foo:  bar  }
   - is_false:  _source
 
+  - do:
+      get:
+        index:  test_1
+        type:   test
+        id:     1
+        fields: foo
+        _source: true
+
+  - match:   { _index:   test_1  }
+  - match:   { _type:    test    }
+  - match:   { _id:      1       }
+  - match:   { fields.foo:  bar  }
+  - match:   { _source.foo: bar  }
+
   - do:
       get:
         index:  test_1
diff --git a/rest-api-spec/test/get/70_source_filtering.yaml b/rest-api-spec/test/get/70_source_filtering.yaml
new file mode 100644
index 00000000000..ad0466f3a79
--- /dev/null
+++ b/rest-api-spec/test/get/70_source_filtering.yaml
@@ -0,0 +1,42 @@
+---
+"Source filtering":
+
+  - do:
+      index:
+        index:  test_1
+        type:   test
+        id:     1
+        body:   { "include": { "field1" : "v1", "field2": "v2" }, "count": 1 }
+  - do:
+      get: { index:  test_1, type: test, id: 1, _source: false }
+
+  - match:   { _index:   test_1  }
+  - match:   { _type:    test    }
+  - match:   { _id:      1       }
+  - is_false:  _source
+
+  - do:
+      get: { index:  test_1, type: test, id: 1, _source: true }
+  - match:  { _source.include.field1: v1 }
+
+  - do:
+      get: { index:  test_1, type: test, id: 1, _source: include.field1 }
+  - match:  { _source.include.field1: v1 }
+  - is_false: _source.include.field2
+
+  - do:
+      get: { index:  test_1, type: test, id: 1, _source_include: include.field1 }
+  - match:  { _source.include.field1: v1 }
+  - is_false: _source.include.field2
+
+  - do:
+      get: { index:  test_1, type: test, id: 1, _source_include: "include.field1,include.field2" }
+  - match:  { _source.include.field1: v1 }
+  - match:  { _source.include.field2: v2 }
+  - is_false: _source.count
+
+  - do:
+      get: { index:  test_1, type: test, id: 1, _source_include: include, _source_exclude: "*.field2" }
+  - match:  { _source.include.field1: v1 }
+  - is_false: _source.include.field2
+  - is_false: _source.count
diff --git a/rest-api-spec/test/get_source/70_source_filtering.yaml b/rest-api-spec/test/get_source/70_source_filtering.yaml
new file mode 100644
index 00000000000..10a5aead213
--- /dev/null
+++ b/rest-api-spec/test/get_source/70_source_filtering.yaml
@@ -0,0 +1,26 @@
+---
+"Source filtering":
+
+  - do:
+      index:
+        index:  test_1
+        type:   test
+        id:     1
+        body:   { "include": { "field1" : "v1", "field2": "v2" }, "count": 1 }
+
+  - do:
+      get_source: { index:  test_1, type: test, id: 1, include: include.field1 }
+  - match:  { include.field1: v1 }
+  - is_false: include.field2
+
+  - do:
+      get_source: { index:  test_1, type: test, id: 1, include: "include.field1,include.field2" }
+  - match:  { include.field1: v1 }
+  - match:  { include.field2: v2 }
+  - is_false: count
+
+  - do:
+      get_source: { index:  test_1, type: test, id: 1, include: include, exclude: "*.field2" }
+  - match:  { include.field1: v1 }
+  - is_false: include.field2
+  - is_false: count
diff --git a/rest-api-spec/test/mget/70_source_filtering.yaml b/rest-api-spec/test/mget/70_source_filtering.yaml
new file mode 100644
index 00000000000..715fb378f18
--- /dev/null
+++ b/rest-api-spec/test/mget/70_source_filtering.yaml
@@ -0,0 +1,99 @@
+---
+"Source filtering":
+
+  - do:
+      index:
+        index:  test_1
+        type:   test
+        id:     1
+        body:   { "include": { "field1" : "v1", "field2": "v2" }, "count": 1 }
+  - do:
+      index:
+        index:  test_1
+        type:   test
+        id:     2
+        body:   { "include": { "field1" : "v1", "field2": "v2" }, "count": 1 }
+  - do:
+      mget:
+        body: >
+          { docs:
+              [ { _index:  "test_1", _type: "test", _id: "1", _source: false },
+                { _index:  "test_1", _type: "test", _id: "2", _source: true }
+              ]
+          }
+
+  - match:   { docs.0._id: 1 }
+  - is_false:  docs.0._source
+  - match:   { docs.1._id: 2 }
+  - is_true:   docs.1._source
+
+
+  - do:
+      mget:
+        body:
+          docs:
+            - { _index:  "test_1", _type: "test", _id: "1", _source: include.field1 }
+            - { _index:  "test_1", _type: "test", _id: "2", _source: [ include.field1 ] }
+
+  - match:   { docs.0._source: { include: { field1: v1 }} }
+  - match:   { docs.1._source: { include: { field1: v1 }} }
+
+
+  - do:
+      mget:
+        body:
+          docs:
+            - { _index:  "test_1", _type: "test", _id: "1", _source: { include: include.field1 }  }
+            - { _index:  "test_1", _type: "test", _id: "2", _source: { include: [ include.field1 ] } }
+
+  - match:   { docs.0._source: { include: { field1: v1 }} }
+  - match:   { docs.1._source: { include: { field1: v1 }} }
+
+  - do:
+      mget:
+        body:
+          docs:
+            - { _index:  "test_1", _type: "test", _id: "1", _source: { include: [ include ], exclude: [ "*.field2" ] } }
+
+  - match:   { docs.0._source: { include: { field1: v1 }} }
+
+  - do:
+      mget:
+        _source: false
+        index: test_1
+        body: { ids: [ 1,2 ] }
+  - is_false:   docs.0._source
+  - is_false:   docs.1._source
+
+  - do:
+      mget:
+        _source: true
+        index: test_1
+        body: { ids: [ 1,2 ] }
+  - is_true:   docs.0._source
+  - is_true:   docs.1._source
+
+  - do:
+      mget:
+        _source: include.field1
+        index: test_1
+        body: { ids: [ 1,2 ] }
+  - match:   { docs.0._source: { include: { field1: v1 }} }
+  - match:   { docs.1._source: { include: { field1: v1 }} }
+
+  - do:
+      mget:
+        _source_include: "include.field1,count"
+        index: test_1
+        body: { ids: [ 1,2 ] }
+  - match:   { docs.0._source: { include: { field1: v1 }, count: 1} }
+  - match:   { docs.1._source: { include: { field1: v1 }, count: 1} }
+
+  - do:
+      mget:
+        _source_include: include
+        _source_exclude: "*.field2"
+        index: test_1
+        body: { ids: [ 1,2 ] }
+  - match:   { docs.0._source: { include: { field1: v1 } } }
+  - match:   { docs.1._source: { include: { field1: v1 } } }
diff --git a/rest-api-spec/test/search/10_source_filtering.yaml b/rest-api-spec/test/search/10_source_filtering.yaml
new file mode 100644
index 00000000000..a078f89d1fd
--- /dev/null
+++ b/rest-api-spec/test/search/10_source_filtering.yaml
@@ -0,0 +1,92 @@
+---
+"Source filtering":
+
+  - do:
+      index:
+        index:  test_1
+        type:   test
+        id:     1
+        body:   { "include": { "field1" : "v1", "field2": "v2" }, "count": 1 }
+  - do:
+      indices.refresh:
+
+
+  - do:
+      search:
+      # stringified for boolean value
+        body: "{ _source: true, query: { match_all: {} } }"
+
+  - length:   { hits.hits: 1  }
+  - match: { hits.hits.0._source.count: 1 }
+
+  - do: { search: { body: "{ _source: false, query: { match_all: {} } }" } }
+  - length:   { hits.hits: 1  }
+  - is_false: hits.hits.0._source
+
+  - do: { search: { body: { query: { match_all: {} } } } }
+  - length:   { hits.hits: 1  }
+  - match: { hits.hits.0._source.count: 1 }
+
+  - do: { search: { body: { _source: include.field1, query: { match_all: {} } } } }
+  - match:  { hits.hits.0._source.include.field1: v1 }
+  - is_false: hits.hits.0._source.include.field2
+
+  - do: { search: { _source_include: include.field1, body: { _source: include.field2, query: { match_all: {} } } } }
+  - match:  { hits.hits.0._source.include.field1: v1 }
+  - is_false: hits.hits.0._source.include.field2
+
+  - do: { search: { _source_include: include.field1, body: { query: { match_all: {} } } } }
+  - match:  { hits.hits.0._source.include.field1: v1 }
+  - is_false: hits.hits.0._source.include.field2
+
+  - do: { search: { _source_exclude: count, body: { query: { match_all: {} } } } }
+  - match:  { hits.hits.0._source.include: { field1 : v1 , field2: v2 }}
+  - is_false: hits.hits.0._source.count
+
+
+  - do:
+      search:
+        body:
+          _source: [ include.field1, include.field2 ]
+          query: { match_all: {} }
+  - match:  { hits.hits.0._source.include.field1: v1 }
+  - match:  { hits.hits.0._source.include.field2: v2 }
+  - is_false: hits.hits.0._source.count
+
+  - do:
+      search:
+        body:
+          _source:
+            include: [ include.field1, include.field2 ]
+          query: { match_all: {} }
+  - match:  { hits.hits.0._source.include.field1: v1 }
+  - match:  { hits.hits.0._source.include.field2: v2 }
+  - is_false: hits.hits.0._source.count
+
+  - do:
+      search:
+        body:
+          _source:
+            includes: include
+            excludes: "*.field2"
+          query: { match_all: {} }
+  - match:  { hits.hits.0._source.include.field1: v1 }
+  - is_false:  hits.hits.0._source.include.field2
+
+
+  - do:
+      search:
+        body:
+          fields: [ include.field2 ]
+          query: { match_all: {} }
+  - match: { hits.hits.0.fields: { include.field2 : v2 }}
+  - is_false:  hits.hits.0._source
+
+  - do:
+        search:
+          body:
+            fields: [ include.field2, _source ]
+            query: { match_all: {} }
+  - match: { hits.hits.0.fields: { include.field2 : v2 }}
+  - is_true:  hits.hits.0._source
+