diff --git a/AK/Tests/TestByteBuffer.cpp b/AK/Tests/TestByteBuffer.cpp
new file mode 100644
index 00000000000..ce2e323336d
--- /dev/null
+++ b/AK/Tests/TestByteBuffer.cpp
@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 2020, the SerenityOS developers.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. 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.
+ *
+ * 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 HOLDER 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.
+ */
+
+#include <AK/TestSuite.h>
+
+#include <AK/ByteBuffer.h>
+
+TEST_CASE(equality_operator)
+{
+    ByteBuffer a = ByteBuffer::copy("Hello, world", 7);
+    ByteBuffer b = ByteBuffer::copy("Hello, friend", 7);
+    // `a` and `b` are both "Hello, ".
+    ByteBuffer c = ByteBuffer::copy("asdf", 4);
+    ByteBuffer d;
+    EXPECT_EQ(a == a, true);
+    EXPECT_EQ(a == b, true);
+    EXPECT_EQ(a == c, false);
+    EXPECT_EQ(a == d, false);
+    EXPECT_EQ(b == a, true);
+    EXPECT_EQ(b == b, true);
+    EXPECT_EQ(b == c, false);
+    EXPECT_EQ(b == d, false);
+    EXPECT_EQ(c == a, false);
+    EXPECT_EQ(c == b, false);
+    EXPECT_EQ(c == c, true);
+    EXPECT_EQ(c == d, false);
+    EXPECT_EQ(d == a, false);
+    EXPECT_EQ(d == b, false);
+    EXPECT_EQ(d == c, false);
+    EXPECT_EQ(d == d, true);
+}
+
+TEST_CASE(other_operators)
+{
+    ByteBuffer a = ByteBuffer::copy("Hello, world", 7);
+    ByteBuffer b = ByteBuffer::copy("Hello, friend", 7);
+    // `a` and `b` are both "Hello, ".
+    ByteBuffer c = ByteBuffer::copy("asdf", 4);
+    ByteBuffer d;
+    EXPECT_EQ(a < a, true);
+    EXPECT_EQ(a <= b, true);
+    EXPECT_EQ(a >= c, false);
+    EXPECT_EQ(a > d, false);
+}
+
+TEST_MAIN(ByteBuffer)