diff --git a/src/test/unittests/net/FingerprintDatabaseTests.cpp b/src/test/unittests/net/FingerprintDatabaseTests.cpp
new file mode 100644
index 000000000..be63ca06b
--- /dev/null
+++ b/src/test/unittests/net/FingerprintDatabaseTests.cpp
@@ -0,0 +1,84 @@
+/*
+ * Deskflow -- mouse and keyboard sharing utility
+ * SPDX-FileCopyrightText: (C) 2025 Deskflow Developers
+ * SPDX-FileCopyrightText: (C) 2021 Barrier Contributors
+ * SPDX-License-Identifier: GPL-2.0-only WITH LicenseRef-OpenSSL-Exception
+ */
+
+#include "net/FingerprintDatabase.h"
+
+#include <gtest/gtest.h>
+
+namespace deskflow {
+
+TEST(FingerprintDatabase, parseDbLine)
+{
+  ASSERT_FALSE(FingerprintDatabase::parseDbLine("").valid());
+  ASSERT_FALSE(FingerprintDatabase::parseDbLine("abcd").valid());
+  ASSERT_FALSE(FingerprintDatabase::parseDbLine("v1:algo:something").valid());
+  ASSERT_FALSE(FingerprintDatabase::parseDbLine("v2:algo:something").valid());
+  ASSERT_FALSE(FingerprintDatabase::parseDbLine("v2:algo:01020304abc").valid());
+  ASSERT_FALSE(FingerprintDatabase::parseDbLine("v2:algo:01020304ZZ").valid());
+  ASSERT_EQ(FingerprintDatabase::parseDbLine("v2:algo:01020304ab"), (FingerprintData{"algo", {1, 2, 3, 4, 0xab}}));
+}
+
+TEST(FingerprintDatabase, read)
+{
+  std::istringstream stream;
+  stream.str(R"(
+v2:algo1:01020304ab
+v2:algo2:03040506ab
+AB:CD:EF:00:01:02:03:04:05:06:07:08:09:10:11:12:13:14:15:16
+)");
+  FingerprintDatabase db;
+  db.readStream(stream);
+
+  std::vector<FingerprintData> expected = {
+      {"algo1", {1, 2, 3, 4, 0xab}},
+      {"algo2", {3, 4, 5, 6, 0xab}},
+      {"sha1", {0xab, 0xcd, 0xef, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16}},
+  };
+  ASSERT_EQ(db.fingerprints(), expected);
+}
+
+TEST(FingerprintDatabase, write)
+{
+  std::ostringstream stream;
+
+  FingerprintDatabase db;
+  db.addTrusted({"algo1", {1, 2, 3, 4, 0xab}});
+  db.addTrusted({"algo2", {3, 4, 5, 6, 0xab}});
+  db.writeStream(stream);
+
+  ASSERT_EQ(stream.str(), R"(v2:algo1:01020304ab
+v2:algo2:03040506ab
+)");
+}
+
+TEST(FingerprintDatabase, clear)
+{
+  FingerprintDatabase db;
+  db.addTrusted({"algo1", {1, 2, 3, 4, 0xab}});
+  db.clear();
+  ASSERT_TRUE(db.fingerprints().empty());
+}
+
+TEST(FingerprintDatabase, addTrusted_noDuplicates)
+{
+  FingerprintDatabase db;
+  db.addTrusted({"algo1", {1, 2, 3, 4, 0xab}});
+  db.addTrusted({"algo2", {3, 4, 5, 6, 0xab}});
+  db.addTrusted({"algo1", {1, 2, 3, 4, 0xab}});
+  ASSERT_EQ(db.fingerprints().size(), 2);
+}
+
+TEST(FingerprintDatabase, isTrusted)
+{
+  FingerprintDatabase db;
+  db.addTrusted({"algo1", {1, 2, 3, 4, 0xab}});
+  ASSERT_TRUE(db.isTrusted({"algo1", {1, 2, 3, 4, 0xab}}));
+  ASSERT_FALSE(db.isTrusted({"algo2", {1, 2, 3, 4, 0xab}}));
+  ASSERT_FALSE(db.isTrusted({"algo1", {1, 2, 3, 4, 0xac}}));
+}
+
+} // namespace deskflow