diff --git a/README.adoc b/README.adoc
index 1c663e5..ce29f88 100644
--- a/README.adoc
+++ b/README.adoc
@@ -397,7 +397,7 @@ strings and you can use unsupported fields in an `Entity` by converting it to
 * [x] Account
 * [x] Application
 * [x] Attachment
-* [ ] Card
+* [x] Card
 * [ ] Context
 * [ ] Conversation
 * [ ] Emoji
diff --git a/tests/entities/test_card.cpp b/tests/entities/test_card.cpp
new file mode 100644
index 0000000..a771df2
--- /dev/null
+++ b/tests/entities/test_card.cpp
@@ -0,0 +1,104 @@
+/*  This file is part of mastodon-cpp.
+ *  Copyright © 2019 tastytea <tastytea@tastytea.de>
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, version 3.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <exception>
+#include <string>
+#include <catch.hpp>
+#include "easy/entities/card.hpp"
+
+using std::string;
+
+using namespace Mastodon;
+
+SCENARIO ("Easy::Card works as intended", "[entity]")
+{
+    GIVEN ("An Easy::Card object")
+    {
+        Easy::Card card;
+        bool exception = false;
+
+        WHEN ("It is initialized with valid attachment data")
+        {
+            const string data =
+                "{\"url\":\"https://example.com/coolstuff\","
+                "\"title\":\"cool stuff\","
+                "\"description\":\"Very cool stuff.\","
+                "\"type\":\"link\","
+                "\"author_name\":\"\","
+                "\"author_url\":\"\","
+                "\"provider_name\":\"\","
+                "\"provider_url\":\"\","
+                "\"html\":\"\","
+                "\"width\":400,"
+                "\"height\":300,"
+                "\"image\":\"https://example.com/image.png\","
+                "\"embed_url\":\"\"}";
+
+            try
+            {
+                card.from_string(data);
+            }
+            catch (const std::exception &e)
+            {
+                exception = true;
+            }
+
+            THEN ("No exception is thrown")
+                AND_THEN ("Card is valid")
+                AND_THEN ("The attributes are set to the right values")
+            {
+                REQUIRE_FALSE(exception);
+                REQUIRE(card.valid());
+
+                REQUIRE(card.url() == "https://example.com/coolstuff");
+                REQUIRE(card.title() == "cool stuff");
+                REQUIRE(card.description() == "Very cool stuff.");
+                REQUIRE(card.type()
+                        == Easy::card_type::Link);
+                REQUIRE(card.author_name() == "");
+                REQUIRE(card.author_url() == "");
+                REQUIRE(card.provider_name() == "");
+                REQUIRE(card.provider_url() == "");
+                REQUIRE(card.html() == "");
+                REQUIRE(card.width() == 400);
+                REQUIRE(card.height() == 300);
+                REQUIRE(card.image() == "https://example.com/image.png");
+                REQUIRE(card.embed_url() == "");
+            }
+        }
+
+        WHEN ("It is initialized with an empty string")
+        {
+            try
+            {
+                card.from_string("");
+            }
+            catch (const std::exception &e)
+            {
+                exception = true;
+            }
+
+            THEN ("No exception is thrown")
+                AND_THEN ("It is not valid")
+                AND_THEN ("id is empty")
+            {
+                REQUIRE_FALSE(exception);
+                REQUIRE_FALSE(card.valid());
+                REQUIRE(card.url() == "");
+            }
+        }
+    }
+}