zig/test/standalone/test_runner_path/build.zig

const Builder = @import("std").build.Builder;

pub fn build(b: *Builder) void {
    const test_exe = b.addTestExe("test", "test.zig");
    test_exe.test_runner = "test_runner.zig";

    const test_run = test_exe.run();

    const test_step = b.step("test", "Test the program");
    test_step.dependOn(&test_run.step);
}