diff --git a/test/cpp/src/TestClient.cc b/test/cpp/src/TestClient.cc
index d340e26..e12b65b 100644
--- a/test/cpp/src/TestClient.cc
+++ b/test/cpp/src/TestClient.cc
@@ -99,6 +99,13 @@
     printf("testI64(-34359738368)");
     int64_t i64 = testClient.testI64(-34359738368LL);
     printf(" = %ld\n", i64);
+
+    /**
+     * DOUBLE TEST
+     */
+    printf("testDouble(-5.2098523)");
+    double dub = testClient.testDouble(-5.2098523);
+    printf(" = %lf\n", dub);
     
     /**
      * STRUCT TEST
diff --git a/test/cpp/src/TestServer.cc b/test/cpp/src/TestServer.cc
index 63a7594..97d3440 100644
--- a/test/cpp/src/TestServer.cc
+++ b/test/cpp/src/TestServer.cc
@@ -47,6 +47,11 @@
     return thing;
   }
 
+  double testDouble(double thing) {
+    printf("testDouble(%lf)\n", thing);
+    return thing;
+  }
+
   Xtruct testStruct(Xtruct thing) {
     printf("testStruct({\"%s\", %d, %d, %ld})\n",
            thing.string_thing.c_str(),