diff --git a/src/resource.h b/src/resource.h
index c0db8ceb..cab6b5cb 100644
--- a/src/resource.h
+++ b/src/resource.h
@@ -36,9 +36,12 @@ class MonitoredResource {
   bool operator==(const MonitoredResource& other) const {
     return other.type_ == type_ && other.labels_ == labels_;
   }
+  bool operator!=(const MonitoredResource& other) const {
+    return !(other == *this);
+  }
   bool operator<(const MonitoredResource& other) const {
-    return other.type_ < type_
-        || (other.type_ == type_ && other.labels_ < labels_);
+    return type_ < other.type_
+        || (type_ == other.type_ && labels_ < other.labels_);
   }
 
   json::value ToJSON() const;
diff --git a/test/Makefile b/test/Makefile
index 0ce40f18..f1150410 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -18,7 +18,7 @@ CPPFLAGS+= \
     -isystem $(GTEST_DIR)/include -I$(GMOCK_DIR)/include \
     -I$(YAML_CPP_DIR)/include
 CXXFLAGS=-std=c++11 -g -pthread
-LDLIBS=-lpthread -lboost_program_options -lyaml-cpp
+LDLIBS=-lpthread -lboost_program_options -lyaml-cpp -lyajl
 LDFLAGS=-L$(YAML_CPP_LIBDIR)
 
 # Where to find code under test.
@@ -31,6 +31,7 @@ TESTS=\
       base64_unittest \
       configuration_unittest \
       format_unittest \
+      resource_unittest \
       time_unittest
 
 GTEST_LIB=gtest_lib.a
@@ -79,6 +80,8 @@ base64_unittest: $(GTEST_LIB) base64_unittest.o $(SRC_DIR)/base64.o
 	$(CXX) $(LDFLAGS) $^ $(LDLIBS) -o $@
 configuration_unittest: $(GTEST_LIB) $(YAML_CPP_LIBS) configuration_unittest.o $(SRC_DIR)/configuration.o
 	$(CXX) $(LDFLAGS) $^ $(LDLIBS) -o $@
+resource_unittest: $(GTEST_LIB) resource_unittest.o $(SRC_DIR)/resource.o $(SRC_DIR)/json.o
+	$(CXX) $(LDFLAGS) $^ $(LDLIBS) -o $@
 time_unittest: $(GTEST_LIB) time_unittest.o $(SRC_DIR)/time.o
 	$(CXX) $(LDFLAGS) $^ $(LDLIBS) -o $@
 
diff --git a/test/resource_unittest.cc b/test/resource_unittest.cc
new file mode 100644
index 00000000..6ae903ce
--- /dev/null
+++ b/test/resource_unittest.cc
@@ -0,0 +1,53 @@
+#include "../src/resource.h"
+#include "../src/json.h"
+#include "gtest/gtest.h"
+
+namespace {
+
+TEST(ResourceTest, Type) {
+  google::MonitoredResource mr("some_resource", {});
+  EXPECT_EQ("some_resource", mr.type());
+}
+
+TEST(ResourceTest, Labels) {
+  google::MonitoredResource mr("", {{"foo", "bar"}, {"bar", "baz"}});
+  EXPECT_EQ(2, mr.labels().size());
+  EXPECT_EQ("bar", mr.labels().at("foo"));
+  EXPECT_EQ("baz", mr.labels().at("bar"));
+}
+
+TEST(ResourceTest, BasicEquality) {
+  google::MonitoredResource mr1("", {});
+  google::MonitoredResource mr2("", {});
+
+  EXPECT_EQ(mr1, mr2);
+}
+
+TEST(ResourceTest, BasicTypeComparison) {
+  google::MonitoredResource mr1("1", {});
+  google::MonitoredResource mr2("2", {});
+
+  EXPECT_LT(mr1, mr2);
+}
+
+TEST(ResourceTest, BasicLabelComparison) {
+  google::MonitoredResource mr1("", {{"a", "a"}});
+  google::MonitoredResource mr2("", {{"b", "b"}});
+
+  EXPECT_NE(mr1, mr2);
+  EXPECT_LT(mr1, mr2);
+}
+TEST(ResourceTest, BasicJson) {
+  json::value target = json::object({
+    {"type", json::string("test")},
+    {"labels", json::object({
+      {"a", json::string("a")},
+      {"b", json::string("b")}
+    })}
+  });
+
+  google::MonitoredResource mr("test", {{"a", "a"}, {"b", "b"}});
+
+  EXPECT_EQ(target->ToString(), mr.ToJSON()->ToString());
+}
+}  // namespace