diff --git a/validators/array.test.ts b/validators/array.test.ts
index e084bc7..a43ad49 100644
--- a/validators/array.test.ts
+++ b/validators/array.test.ts
@@ -25,11 +25,11 @@ Deno.test("isArray (no match)", async () => {
     true,
     "",
     "foo",
-    new String(),
-    new String("bar"),
+    String(),
+    String("bar"),
     () => {},
     function named() {},
-    new Object(),
+    {},
     Symbol(),
   ];
   for (const value of values) {
diff --git a/validators/boolean.test.ts b/validators/boolean.test.ts
index 3b61aab..0ba8839 100644
--- a/validators/boolean.test.ts
+++ b/validators/boolean.test.ts
@@ -23,11 +23,11 @@ Deno.test("isBoolean (no match)", async () => {
     1,
     "",
     "foo",
-    new String(),
-    new String("bar"),
+    String(),
+    String("bar"),
     () => {},
     function named() {},
-    new Object(),
+    {},
     Symbol(),
   ];
   for (const value of values) {
diff --git a/validators/empty.test.ts b/validators/empty.test.ts
index f39f6bf..edfccf5 100644
--- a/validators/empty.test.ts
+++ b/validators/empty.test.ts
@@ -27,7 +27,7 @@ Deno.test("isRequired (match)", async () => {
 });
 
 Deno.test("isRequired (no match)", async () => {
-  const values = [
+  const values: (undefined|null)[] = [
     undefined,
     null,
   ];
@@ -59,7 +59,7 @@ Deno.test("isDefined (match)", async () => {
 });
 
 Deno.test("isDefined (no match)", async () => {
-  const values = [
+  const values: undefined[] = [
     undefined,
   ];
   for (const value of values) {
diff --git a/validators/empty.ts b/validators/empty.ts
index 86da8fa..318361a 100644
--- a/validators/empty.ts
+++ b/validators/empty.ts
@@ -66,6 +66,7 @@ export function isNotEmpty(): Validator {
         }
         return {};
       }
+      // noinspection LoopStatementThatDoesntLoopJS
       for (const key in value) {
         return;
       }
diff --git a/validators/number.test.ts b/validators/number.test.ts
index 5053ca6..c28e460 100644
--- a/validators/number.test.ts
+++ b/validators/number.test.ts
@@ -30,7 +30,7 @@ Deno.test("isNumber (no match)", async () => {
     false,
     () => {},
     function named() {},
-    new Object(),
+    {},
     Symbol(),
   ];
   for (const value of values) {
@@ -66,7 +66,7 @@ Deno.test("isInteger (no match)", async () => {
     false,
     () => {},
     function named() {},
-    new Object(),
+    {},
     Symbol(),
     0.1,
   ];
diff --git a/validators/string.test.ts b/validators/string.test.ts
index 2584087..1fe4131 100644
--- a/validators/string.test.ts
+++ b/validators/string.test.ts
@@ -11,8 +11,8 @@ Deno.test("isString (match)", async () => {
     null,
     "",
     "foo",
-    new String(),
-    new String("bar"),
+    String(),
+    String("bar"),
   ];
   for (const value of values) {
     assertEquals(await validate(value, isString()), [], String(value));
@@ -27,7 +27,7 @@ Deno.test("isString (no match)", async () => {
     false,
     () => {},
     function named() {},
-    new Object(),
+    {},
     Symbol(),
   ];
   for (const value of values) {
diff --git a/validators/string.ts b/validators/string.ts
index 4357ac4..2e8cfdd 100644
--- a/validators/string.ts
+++ b/validators/string.ts
@@ -31,7 +31,7 @@ export function isUrl(
     allowDomain = true,
     allowBasicAuth = false,
     allowPort = true,
-    allowRecourcePath = true,
+    allowResourcePath = true,
   }: {
     protocols?: string[] | null;
     allowDataUrl?: boolean;
@@ -41,7 +41,7 @@ export function isUrl(
     allowDomain?: boolean;
     allowBasicAuth?: boolean;
     allowPort?: boolean;
-    allowRecourcePath?: boolean;
+    allowResourcePath?: boolean;
   } = {},
 ): Validator {
   return {
@@ -95,7 +95,7 @@ export function isUrl(
           // port number (optional)
           regex += "(?::\\d{2,5})?";
         }
-        if (allowRecourcePath) {
+        if (allowResourcePath) {
           // resource path (optional)
           regex += "(?:[/?#]\\S*)?";
         }
@@ -106,7 +106,7 @@ export function isUrl(
       }
       if (allowDataUrl) {
         const regex =
-          /^\s*data:([a-z]+\/[a-z]+(;[a-z\-]+\=[a-z\-]+)?)?(;base64)?,[a-z0-9\!\$\&\'\,\(\)\*\+\,\;\=\-\.\_\~\:\@\/\?\%\s]*\s*$/i;
+          /^\s*data:([a-z]+\/[a-z]+(;[a-z\-]+=[a-z\-]+)?)?(;base64)?,[a-z0-9!$&',()*+;=\-._~:@\/?%\s]*\s*$/i;
         if (value.match(regex)) {
           return;
         }
diff --git a/validators/symbol.test.ts b/validators/symbol.test.ts
index af19dd0..54dd3b0 100644
--- a/validators/symbol.test.ts
+++ b/validators/symbol.test.ts
@@ -24,11 +24,11 @@ Deno.test("isSymbol (no match)", async () => {
     false,
     "",
     "foo",
-    new String(),
-    new String("bar"),
+    String(),
+    String("bar"),
     () => {},
     function named() {},
-    new Object(),
+    {},
   ];
   for (const value of values) {
     assertNotEquals(await validate(value, isSymbol()), [], String(value));