diff --git a/.denov b/.denov
index 5dd5c3f4..283d4a01 100644
--- a/.denov
+++ b/.denov
@@ -1 +1 @@
-v0.36.0
\ No newline at end of file
+v0.37.1
\ No newline at end of file
diff --git a/modules-lock.json b/modules-lock.json
index 6812d6b1..c863e652 100644
--- a/modules-lock.json
+++ b/modules-lock.json
@@ -1,6 +1,6 @@
 {
   "https://deno.land/std": {
-    "version": "@v0.36.0",
+    "version": "@v0.37.1",
     "modules": [
       "/util/async.ts",
       "/testing/asserts.ts",
diff --git a/modules.json b/modules.json
index 8431e243..97096ee4 100644
--- a/modules.json
+++ b/modules.json
@@ -1,6 +1,6 @@
 {
   "https://deno.land/std": {
-    "version": "@v0.36.0",
+    "version": "@v0.37.1",
     "modules": [
       "/util/async.ts",
       "/testing/asserts.ts",
diff --git a/pipeline_test.ts b/pipeline_test.ts
index b1523415..4c2deb61 100644
--- a/pipeline_test.ts
+++ b/pipeline_test.ts
@@ -1,7 +1,6 @@
 import { assertEquals } from "./vendor/https/deno.land/std/testing/asserts.ts";
 import { connect } from "./redis.ts";
-const { test } = Deno;
-
+const test = Deno.test;
 const addr = {
   hostname: "127.0.0.1",
   port: 6379
@@ -29,6 +28,7 @@ test(async function testPipeline() {
     ["integer", 1],
     ["integer", 1]
   ]);
+  redis.close();
 });
 
 test(async function testTx() {
@@ -71,6 +71,7 @@ test(async function testTx() {
     parseInt(rep3[4][1] as string),
     parseInt(rep3[0][1] as string) + 3
   );
+  redis.close();
 });
 
 test("pipeline in concurrent", async () => {
@@ -105,4 +106,5 @@ test("pipeline in concurrent", async () => {
       ["bulk", "c"]
     ] // flush()
   ]);
+  redis.close();
 });
diff --git a/pubsub_test.ts b/pubsub_test.ts
index 584abfd6..0da4cee5 100644
--- a/pubsub_test.ts
+++ b/pubsub_test.ts
@@ -1,6 +1,5 @@
 import { assertEquals } from "./vendor/https/deno.land/std/testing/asserts.ts";
 import { connect } from "./redis.ts";
-import { RedisPubSubMessage } from "./pubsub.ts";
 const { test } = Deno;
 const addr = {
   hostname: "127.0.0.1",
diff --git a/tests/connection_test.ts b/tests/connection_test.ts
index c0ec3840..3a1786b8 100644
--- a/tests/connection_test.ts
+++ b/tests/connection_test.ts
@@ -14,9 +14,10 @@ test("ping", async () => {
   assertEquals(await client.ping("Deno"), "Deno");
 });
 test("quit", async () => {
-  const cli = await connect({ hostname: "127.0.0.1", port: 6379 });
-  assertEquals(await cli.quit(), "OK");
-  assertEquals(cli.isClosed, true);
+  const redis = await connect({ hostname: "127.0.0.1", port: 6379 });
+  assertEquals(await redis.quit(), "OK");
+  assertEquals(redis.isClosed, true);
+  redis.close();
 });
 test("select", async () => {
   assertEquals(await client.select(1), "OK");
diff --git a/tests/general_test.ts b/tests/general_test.ts
index 1cb1e4ac..1a2cab15 100644
--- a/tests/general_test.ts
+++ b/tests/general_test.ts
@@ -5,16 +5,16 @@ import {
 } from "../vendor/https/deno.land/std/testing/asserts.ts";
 import { makeTest } from "./test_util.ts";
 
-const { test, client, opts } = await makeTest("general");
+const { test, client: redis, opts } = await makeTest("general");
 test("conccurent", async function testConcurrent() {
   let promises: Promise<any>[] = [];
   for (const key of ["a", "b", "c"]) {
-    promises.push(client.set(key, key));
+    promises.push(redis.set(key, key));
   }
   await Promise.all(promises);
   promises = [];
   for (const key of ["a", "b", "c"]) {
-    promises.push(client.get(key));
+    promises.push(redis.get(key));
   }
   const [a, b, c] = await Promise.all(promises);
   assertEquals(a, "a");
@@ -24,23 +24,28 @@ test("conccurent", async function testConcurrent() {
 
 test("db0", async function testDb0Option() {
   const key = "exists";
-  await client.set(key, "aaa");
-  const exists1 = await client.exists(key);
+  const client1 = await connect({ ...opts, db: 0 });
+  await client1.set(key, "aaa");
+  const exists1 = await client1.exists(key);
   assertEquals(exists1, 1);
   const client2 = await connect({ ...opts, db: 0 });
   const exists2 = await client2.exists(key);
   assertEquals(exists2, 1);
+  client1.close();
+  client2.close();
 });
 
 test("exists", async function testDb1Option() {
   const key = "exists";
   const client1 = await connect({ ...opts, db: 0 });
-  await client.set(key, "aaa");
+  await client1.set(key, "aaa");
   const exists1 = await client1.exists(key);
   assertEquals(exists1, 1);
   const client2 = await connect({ ...opts, db: 1 });
   const exists2 = await client2.exists(key);
   assertEquals(exists2, 0);
+  client1.close();
+  client2.close();
 });
 
 [Infinity, NaN, "", "port"].forEach(v => {
@@ -53,8 +58,8 @@ test("exists", async function testDb1Option() {
 
 test("execRawReply", async () => {
   assertEquals(
-    await client.executor.exec("SET", "key", "a"),
+    await redis.executor.exec("SET", "key", "a"),
     ["status", "OK"]
   );
-  assertEquals(await client.executor.exec("GET", "key"), ["bulk", "a"]);
+  assertEquals(await redis.executor.exec("GET", "key"), ["bulk", "a"]);
 });
diff --git a/vendor/https/deno.land/std/fmt/colors.ts b/vendor/https/deno.land/std/fmt/colors.ts
index 46ae3596..9c68c1ef 100644
--- a/vendor/https/deno.land/std/fmt/colors.ts
+++ b/vendor/https/deno.land/std/fmt/colors.ts
@@ -1 +1 @@
-export * from "https://deno.land/std@v0.36.0/fmt/colors.ts";
+export * from "https://deno.land/std@v0.37.1/fmt/colors.ts";
diff --git a/vendor/https/deno.land/std/io/bufio.ts b/vendor/https/deno.land/std/io/bufio.ts
index 67f1f921..7625ebae 100644
--- a/vendor/https/deno.land/std/io/bufio.ts
+++ b/vendor/https/deno.land/std/io/bufio.ts
@@ -1 +1 @@
-export * from "https://deno.land/std@v0.36.0/io/bufio.ts";
+export * from "https://deno.land/std@v0.37.1/io/bufio.ts";
diff --git a/vendor/https/deno.land/std/testing/asserts.ts b/vendor/https/deno.land/std/testing/asserts.ts
index f6d0ebea..002e7155 100644
--- a/vendor/https/deno.land/std/testing/asserts.ts
+++ b/vendor/https/deno.land/std/testing/asserts.ts
@@ -1 +1 @@
-export * from "https://deno.land/std@v0.36.0/testing/asserts.ts";
+export * from "https://deno.land/std@v0.37.1/testing/asserts.ts";
diff --git a/vendor/https/deno.land/std/util/async.ts b/vendor/https/deno.land/std/util/async.ts
index 40c0deb6..950aa542 100644
--- a/vendor/https/deno.land/std/util/async.ts
+++ b/vendor/https/deno.land/std/util/async.ts
@@ -1 +1 @@
-export * from "https://deno.land/std@v0.36.0/util/async.ts";
+export * from "https://deno.land/std@v0.37.1/util/async.ts";