diff --git a/Makefile.am b/Makefile.am
index c75604f409..07119d633a 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -354,6 +354,7 @@ java_EXTRA_DIST=
java/core/src/test/proto/com/google/protobuf/map_for_proto2_lite_test.proto \
java/core/src/test/proto/com/google/protobuf/map_for_proto2_test.proto \
java/core/src/test/proto/com/google/protobuf/map_initialization_order_test.proto \
+ java/core/src/test/proto/com/google/protobuf/map_lite_test.proto \
java/core/src/test/proto/com/google/protobuf/map_test.proto \
java/core/src/test/proto/com/google/protobuf/multiple_files_test.proto \
java/core/src/test/proto/com/google/protobuf/nested_builders_test.proto \
diff --git a/java/core/generate-test-sources-build.xml b/java/core/generate-test-sources-build.xml
index abcdf5dd52..1d11f13144 100644
--- a/java/core/generate-test-sources-build.xml
+++ b/java/core/generate-test-sources-build.xml
@@ -39,6 +39,7 @@
+
diff --git a/java/core/src/test/proto/com/google/protobuf/map_lite_test.proto b/java/core/src/test/proto/com/google/protobuf/map_lite_test.proto
new file mode 100644
index 0000000000..c04f5d57a7
--- /dev/null
+++ b/java/core/src/test/proto/com/google/protobuf/map_lite_test.proto
@@ -0,0 +1,111 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2008 Google Inc. All rights reserved.
+// https://developers.google.com/protocol-buffers/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+// * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+// * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+syntax = "proto3";
+
+package map_lite_test;
+
+option optimize_for = LITE_RUNTIME;
+option java_package = "map_lite_test";
+option java_outer_classname = "MapTestProto";
+
+message TestMap {
+ message MessageValue {
+ int32 value = 1;
+ }
+ enum EnumValue {
+ FOO = 0;
+ BAR = 1;
+ BAZ = 2;
+ QUX = 3;
+ }
+
+ map int32_to_int32_field = 1;
+ map int32_to_string_field = 2;
+ map int32_to_bytes_field = 3;
+ map int32_to_enum_field = 4;
+ map int32_to_message_field = 5;
+ map string_to_int32_field = 6;
+ map uint32_to_int32_field = 7;
+ map int64_to_int32_field = 8;
+}
+
+// Used to test that a nested builder containing map fields will properly
+// propagate the onChange event and mark its parent dirty when a change
+// is made to a map field.
+message TestOnChangeEventPropagation {
+ TestMap optional_message = 1;
+}
+
+// a decoy of TestMap for testing parsing errors
+message BizarroTestMap {
+ map int32_to_int32_field = 1; // same key type, different value
+ map int32_to_string_field = 2; // different key and value types
+ map int32_to_bytes_field = 3; // different key types, same value
+ map int32_to_enum_field = 4; // different key and value types
+ map int32_to_message_field = 5; // different key and value types
+ map string_to_int32_field = 6; // same key type, different value
+}
+
+// Used to test that java reserved words can be used as protobuf field names
+// Not all reserved words are tested (to avoid bloat) but instead an arbitrary
+// subset of them chosen to cover various keyword categories like
+// type, modifier, declaration, etc.
+message ReservedAsMapField {
+ map if = 1;
+ map const = 2;
+ map private = 3;
+ map class = 4;
+ map int = 5;
+ map void = 6;
+ map string = 7; // These are also proto keywords
+ map package = 8;
+ map enum = 9; // Most recent Java reserved word
+ map null = 10;
+ // null is not a 'reserved word' per se but as a literal needs similar care
+}
+
+message ReservedAsMapFieldWithEnumValue {
+ enum SampleEnum {
+ A = 0;
+ B = 1;
+ }
+ map if = 1;
+ map const = 2;
+ map private = 3;
+ map class = 4;
+ map int = 5;
+ map void = 6;
+ map string = 7; // These are also proto keywords
+ map package = 8;
+ map enum = 9; // Most recent Java reserved word
+ map null = 10;
+ // null is not a 'reserved word' per se but as a literal needs similar care
+}