diff --git a/wagtail/wagtailsearch/tests/test_backends.py b/wagtail/wagtailsearch/tests/test_backends.py
index cecd4ef165..e6c5d2bf6c 100644
--- a/wagtail/wagtailsearch/tests/test_backends.py
+++ b/wagtail/wagtailsearch/tests/test_backends.py
@@ -1,3 +1,5 @@
+# coding: utf-8
+
 from __future__ import absolute_import, unicode_literals
 
 import time
diff --git a/wagtail/wagtailsearch/tests/test_elasticsearch2_backend.py b/wagtail/wagtailsearch/tests/test_elasticsearch2_backend.py
index bdcd4270bd..9ca27230b0 100644
--- a/wagtail/wagtailsearch/tests/test_elasticsearch2_backend.py
+++ b/wagtail/wagtailsearch/tests/test_elasticsearch2_backend.py
@@ -761,7 +761,7 @@ class TestElasticsearch2Mapping(TestCase):
                     'published_date_filter': {'index': 'not_analyzed', 'type': 'date', 'include_in_all': False},
                     'title': {'type': 'string', 'include_in_all': True, 'analyzer': 'edgengram_analyzer', 'search_analyzer': 'standard'},
                     'title_filter': {'index': 'not_analyzed', 'type': 'string', 'include_in_all': False},
-                    'content': {'type': 'string', 'include_in_all': True},
+                    'content': {'type': 'string', 'boost': 2, 'include_in_all': True},
                     'callable_indexed_field': {'type': 'string', 'include_in_all': True},
                     'subobjects': {
                         'properties': {
@@ -865,7 +865,7 @@ class TestElasticsearch2MappingInheritance(TestCase):
                     'published_date_filter': {'index': 'not_analyzed', 'type': 'date', 'include_in_all': False},
                     'title': {'type': 'string', 'include_in_all': True, 'analyzer': 'edgengram_analyzer', 'search_analyzer': 'standard'},
                     'title_filter': {'index': 'not_analyzed', 'type': 'string', 'include_in_all': False},
-                    'content': {'type': 'string', 'include_in_all': True},
+                    'content': {'type': 'string', 'boost': 2, 'include_in_all': True},
                     'callable_indexed_field': {'type': 'string', 'include_in_all': True},
                     'subobjects': {
                         'properties': {
diff --git a/wagtail/wagtailsearch/tests/test_elasticsearch5_backend.py b/wagtail/wagtailsearch/tests/test_elasticsearch5_backend.py
index 0e049b29db..a83cd202ca 100644
--- a/wagtail/wagtailsearch/tests/test_elasticsearch5_backend.py
+++ b/wagtail/wagtailsearch/tests/test_elasticsearch5_backend.py
@@ -760,7 +760,7 @@ class TestElasticsearch5Mapping(TestCase):
                     'published_date_filter': {'type': 'date', 'include_in_all': False},
                     'title': {'type': 'text', 'include_in_all': True, 'analyzer': 'edgengram_analyzer', 'search_analyzer': 'standard'},
                     'title_filter': {'type': 'keyword', 'include_in_all': False},
-                    'content': {'type': 'text', 'include_in_all': True},
+                    'content': {'type': 'text', 'boost': 2, 'include_in_all': True},
                     'callable_indexed_field': {'type': 'text', 'include_in_all': True},
                     'subobjects': {
                         'properties': {
@@ -864,7 +864,7 @@ class TestElasticsearch5MappingInheritance(TestCase):
                     'published_date_filter': {'type': 'date', 'include_in_all': False},
                     'title': {'type': 'text', 'include_in_all': True, 'analyzer': 'edgengram_analyzer', 'search_analyzer': 'standard'},
                     'title_filter': {'type': 'keyword', 'include_in_all': False},
-                    'content': {'type': 'text', 'include_in_all': True},
+                    'content': {'type': 'text', 'boost': 2, 'include_in_all': True},
                     'callable_indexed_field': {'type': 'text', 'include_in_all': True},
                     'subobjects': {
                         'properties': {
diff --git a/wagtail/wagtailsearch/tests/test_elasticsearch_backend.py b/wagtail/wagtailsearch/tests/test_elasticsearch_backend.py
index ed944cd6b3..1250b6188b 100644
--- a/wagtail/wagtailsearch/tests/test_elasticsearch_backend.py
+++ b/wagtail/wagtailsearch/tests/test_elasticsearch_backend.py
@@ -774,7 +774,7 @@ class TestElasticsearchMapping(TestCase):
                     'published_date_filter': {'index': 'not_analyzed', 'type': 'date', 'include_in_all': False},
                     'title': {'type': 'string', 'include_in_all': True, 'index_analyzer': 'edgengram_analyzer'},
                     'title_filter': {'index': 'not_analyzed', 'type': 'string', 'include_in_all': False},
-                    'content': {'type': 'string', 'include_in_all': True},
+                    'content': {'type': 'string', 'boost': 2, 'include_in_all': True},
                     'callable_indexed_field': {'type': 'string', 'include_in_all': True},
                     'tags': {
                         'type': 'nested',
@@ -881,7 +881,7 @@ class TestElasticsearchMappingInheritance(TestCase):
                     'published_date_filter': {'index': 'not_analyzed', 'type': 'date', 'include_in_all': False},
                     'title': {'type': 'string', 'include_in_all': True, 'index_analyzer': 'edgengram_analyzer'},
                     'title_filter': {'index': 'not_analyzed', 'type': 'string', 'include_in_all': False},
-                    'content': {'type': 'string', 'include_in_all': True},
+                    'content': {'type': 'string', 'boost': 2, 'include_in_all': True},
                     'callable_indexed_field': {'type': 'string', 'include_in_all': True},
                     'tags': {
                         'type': 'nested',