diff --git a/ContentGrabbingJi-CacheStore-api/src/test/java/net/lamgc/cgj/bot/cache/convert/StringToStringConverterTest.java b/ContentGrabbingJi-CacheStore-api/src/test/java/net/lamgc/cgj/bot/cache/convert/StringToStringConverterTest.java
new file mode 100644
index 0000000..336d513
--- /dev/null
+++ b/ContentGrabbingJi-CacheStore-api/src/test/java/net/lamgc/cgj/bot/cache/convert/StringToStringConverterTest.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2020  LamGC
+ *
+ * ContentGrabbingJi is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * ContentGrabbingJi 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 Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package net.lamgc.cgj.bot.cache.convert;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+/**
+ * @see StringToStringConverter
+ */
+public class StringToStringConverterTest {
+
+    private final Converter<String, String> stringConverter = new StringToStringConverter();
+
+    private final static String TEST_CONTENT = "test";
+
+    @Test
+    public void convertTest() {
+        Assert.assertEquals(TEST_CONTENT, stringConverter.to(TEST_CONTENT));
+        Assert.assertEquals(TEST_CONTENT, stringConverter.from(TEST_CONTENT));
+    }
+
+}
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