diff --git a/build.zig b/build.zig
index 66809ff69213c3124e824ad35e340316126c0f8d..1fd32f88738934575276b17d46f822a4deb03b37 100644
--- a/build.zig
+++ b/build.zig
@@ -22,4 +22,16 @@ pub fn build(b: *std.Build) void {
 
     const run_step = b.step("run", "Run the app");
     run_step.dependOn(&run_cmd.step);
+
+    const tests = b.addTest(.{
+        .root_source_file = b.path("test.zig"),
+        .target = target,
+        .optimize = mode,
+    });
+    deps.addAllTo(tests);
+
+    const test_step = b.step("test", "Run all library tests");
+    const tests_run = b.addRunArtifact(tests);
+    tests_run.has_side_effects = true;
+    test_step.dependOn(&tests_run.step);
 }
diff --git a/licenses.txt b/licenses.txt
index 6336b470e0dc9933d1fad883c84eaf86174573d6..728089f444b1699f3c94f6841d719abda91c029f 100644
--- a/licenses.txt
+++ b/licenses.txt
@@ -1,3 +1,4 @@
 MIT:
 = https://spdx.org/licenses/MIT
 - This
+- git https://github.com/nektro/zig-expect
diff --git a/test.zig b/test.zig
new file mode 100644
index 0000000000000000000000000000000000000000..48bc936e101e1f1637603264482b43a3258192bb
--- /dev/null
+++ b/test.zig
@@ -0,0 +1,21 @@
+const std = @import("std");
+const leven = @import("leven").leven;
+const expect = @import("expect").expect;
+
+test {
+    const alloc = std.testing.allocator;
+    try expect(try leven(u8, alloc, "a", "b", 20)).toEqual(1);
+    try expect(try leven(u8, alloc, "ab", "ac", 20)).toEqual(1);
+    try expect(try leven(u8, alloc, "ac", "bc", 20)).toEqual(1);
+    try expect(try leven(u8, alloc, "abc", "axc", 20)).toEqual(1);
+    try expect(try leven(u8, alloc, "kitten", "sitting", 20)).toEqual(3);
+    try expect(try leven(u8, alloc, "xabxcdxxefxgx", "1ab2cd34ef5g6", 20)).toEqual(6);
+    try expect(try leven(u8, alloc, "cat", "cow", 20)).toEqual(2);
+    try expect(try leven(u8, alloc, "xabxcdxxefxgx", "abcdefg", 20)).toEqual(6);
+    try expect(try leven(u8, alloc, "javawasneat", "scalaisgreat", 20)).toEqual(7);
+    try expect(try leven(u8, alloc, "example", "samples", 20)).toEqual(3);
+    try expect(try leven(u8, alloc, "sturgeon", "urgently", 20)).toEqual(6);
+    try expect(try leven(u8, alloc, "levenshtein", "frankenstein", 20)).toEqual(6);
+    try expect(try leven(u8, alloc, "distance", "difference", 20)).toEqual(5);
+    // try expect(try leven(u8, alloc, "因為我是中國人所以我會說中文", "因為我是英國人所以我會說英文", 20)).toEqual(2);
+}
diff --git a/zig.mod b/zig.mod
index a223018c23bbce80aa31465aa4ead7bde80be8bf..c60417d1f67bb5f1573767fc7442c5eb789faf7a 100644
--- a/zig.mod
+++ b/zig.mod
@@ -3,3 +3,5 @@ name: leven
 main: src/lib.zig
 license: MIT
 description: Measure the difference between two slices using the Levenshtein distance algorithm
+root_dependencies:
+  - src: git https://github.com/nektro/zig-expect