diff --git a/comparison.test.ts b/comparison.test.ts
index 8195e13..29505b0 100644
--- a/comparison.test.ts
+++ b/comparison.test.ts
@@ -1,14 +1,14 @@
-import { expect, test } from "./deps.test.ts";
 import { bool, cmp, is } from "./comparison.ts";
+import { expect, it } from "./deps.test.ts";
 
-test("cmp", () => {
+it("cmp", () => {
   expect([8, 3, 5].sort(cmp())).toEqual([3, 5, 8]);
   expect([8, 3, 5, 8].sort(cmp({ reverse: true }))).toEqual([8, 8, 5, 3]);
   expect([-2, 8, -7].sort(cmp({ key: Math.abs }))).toEqual([-2, -7, 8]);
   expect(["c", "a", "b"].sort(cmp())).toEqual(["a", "b", "c"]);
 });
 
-test("is", () => {
+it("is", () => {
   const f1 = is(5);
   expect(f1(5)).toBe(true);
   expect(f1(4)).toBe(false);
@@ -23,7 +23,7 @@ test("is", () => {
   expect(f2({ y: 1 } as any)).toBe(false);
 });
 
-test("bool", () => {
+it("bool", () => {
   expect(bool(null)).toBe(false);
   expect(bool(undefined)).toBe(false);
 
diff --git a/composition.test.ts b/composition.test.ts
index a84b0e1..c3343bb 100644
--- a/composition.test.ts
+++ b/composition.test.ts
@@ -1,16 +1,16 @@
-import { expect, test } from "./deps.test.ts";
 import { identity, nop, partial, pipe } from "./composition.ts";
+import { expect, it } from "./deps.test.ts";
 
-test("nop", () => {
+it("nop", () => {
   expect(nop()).toBeUndefined();
 });
 
-test("identity", () => {
+it("identity", () => {
   expect(identity(5)).toBe(5);
   expect(identity(null)).toBe(null);
 });
 
-test("partial", () => {
+it("partial", () => {
   const func1 = (conf: { a: number; b: string; c: number }) =>
     `${conf.a}${conf.b}${conf.c}`;
   const pfunc1 = partial({ b: "test" }, func1);
@@ -22,7 +22,7 @@ test("partial", () => {
   expect(pfunc2({ a: 2 }, 3)).toEqual("2test3");
 });
 
-test("pipe", () => {
+it("pipe", () => {
   const f = pipe((x: number) => x * 2, (x: number) => x + 1);
   expect(f(1)).toBe(3);
   expect(f(2)).toBe(5);
diff --git a/deps.test.ts b/deps.test.ts
index 0ad5f7d..c973a09 100644
--- a/deps.test.ts
+++ b/deps.test.ts
@@ -1 +1 @@
-export * from "https://code.thunderk.net/typescript/devtools/raw/1.0.0/testing.ts";
+export * from "https://code.thunderk.net/typescript/devtools/raw/1.2.2/testing.ts";
diff --git a/iterables.test.ts b/iterables.test.ts
index 5ec7cdf..ad8b3bd 100644
--- a/iterables.test.ts
+++ b/iterables.test.ts
@@ -1,7 +1,7 @@
-import { expect, test } from "./deps.test.ts";
+import { expect, it } from "./deps.test.ts";
 import { at, first, fmap, last, second, third } from "./iterables.ts";
 
-test("at", () => {
+it("at", () => {
   const second = at(1);
   expect(second([1, 4, 8])).toBe(4);
   expect(second([1])).toBeUndefined();
@@ -11,31 +11,31 @@ test("at", () => {
   expect(second_from_end([1])).toBeUndefined();
 });
 
-test("first", () => {
+it("first", () => {
   expect(first([1, 4, 8])).toBe(1);
   expect(first([1])).toBe(1);
   expect(first([])).toBeUndefined();
 });
 
-test("second", () => {
+it("second", () => {
   expect(second([1, 4, 8])).toBe(4);
   expect(second([1])).toBeUndefined();
   expect(second([])).toBeUndefined();
 });
 
-test("third", () => {
+it("third", () => {
   expect(third([1, 4, 8])).toBe(8);
   expect(third([1, 4])).toBeUndefined();
   expect(third([])).toBeUndefined();
 });
 
-test("last", () => {
+it("last", () => {
   expect(last([1, 4, 8])).toBe(8);
   expect(last([1])).toBe(1);
   expect(last([])).toBeUndefined();
 });
 
-test("fmap", () => {
+it("fmap", () => {
   expect(fmap()([1, 2, 3])).toEqual([1, 2, 3]);
   expect(fmap((x: number) => x * 2)([1, 2, 3])).toEqual([2, 4, 6]);
   expect(fmap(undefined, (x: number) => x % 2 == 0)([1, 2, 3])).toEqual([2]);
diff --git a/objects.test.ts b/objects.test.ts
index 6cf8217..ad411c8 100644
--- a/objects.test.ts
+++ b/objects.test.ts
@@ -1,7 +1,7 @@
-import { expect, test } from "./deps.test.ts";
+import { expect, it } from "./deps.test.ts";
 import { attr } from "./objects.ts";
 
-test("attr", () => {
+it("attr", () => {
   const getx = attr("x");
   expect(getx({ x: 4, y: 5 })).toBe(4);
   expect(getx({ x: undefined, y: 5 })).toBeUndefined();
diff --git a/predicates.test.ts b/predicates.test.ts
index 2302b62..2482499 100644
--- a/predicates.test.ts
+++ b/predicates.test.ts
@@ -1,19 +1,19 @@
-import { expect, test } from "./deps.test.ts";
+import { expect, it } from "./deps.test.ts";
 import { always, and, never, not, or } from "./predicates.ts";
 
-test("always", () => {
+it("always", () => {
   expect(always()).toBe(true);
   expect(always(true)).toBe(true);
   expect(always(false)).toBe(true);
 });
 
-test("never", () => {
+it("never", () => {
   expect(never()).toBe(false);
   expect(never(true)).toBe(false);
   expect(never(false)).toBe(false);
 });
 
-test("not", () => {
+it("not", () => {
   const iseven = (x: number) => x % 2 == 0;
   const isodd = not(iseven);
   expect(iseven(0)).toBe(true);
@@ -24,7 +24,7 @@ test("not", () => {
   expect(isodd(2)).toBe(false);
 });
 
-test("and", () => {
+it("and", () => {
   const f = and((x: number) => x % 2 == 0, (x: number) => x > 5);
   expect(f(0)).toBe(false);
   expect(f(2)).toBe(false);
@@ -33,7 +33,7 @@ test("and", () => {
   expect(f(10)).toBe(true);
 });
 
-test("or", () => {
+it("or", () => {
   const f = or((x: number) => x % 2 == 0, (x: number) => x > 5);
   expect(f(0)).toBe(true);
   expect(f(1)).toBe(false);
diff --git a/typing.test.ts b/typing.test.ts
index 7121ee0..94e1738 100644
--- a/typing.test.ts
+++ b/typing.test.ts
@@ -1,7 +1,7 @@
-import { expect, test } from "./deps.test.ts";
+import { expect, it } from "./deps.test.ts";
 import { isinstance, nn, nnu, nu } from "./typing.ts";
 
-test("isinstance", () => {
+it("isinstance", () => {
   class A {}
   class A1 extends A {}
   class A2 extends A {}
@@ -12,7 +12,7 @@ test("isinstance", () => {
   expect(result).toEqual([f[3], f[4], f[6]]);
 });
 
-test("nn", () => {
+it("nn", () => {
   expect(nn(undefined)).toBeUndefined();
   expect(nn(0)).toBe(0);
   expect(nn("")).toBe("");
@@ -20,7 +20,7 @@ test("nn", () => {
   expect(() => nn(null)).toThrow("null value");
 });
 
-test("nu", () => {
+it("nu", () => {
   expect(nu(null)).toBe(null);
   expect(nu(0)).toBe(0);
   expect(nu("")).toBe("");
@@ -28,7 +28,7 @@ test("nu", () => {
   expect(() => nu(undefined)).toThrow("undefined value");
 });
 
-test("nnu", () => {
+it("nnu", () => {
   expect(nnu(0)).toBe(0);
   expect(nnu("")).toBe("");
   expect(nnu([])).toEqual([]);