diff --git a/.gitignore b/.gitignore
index 68bc17f9..08565a33 100644
--- a/.gitignore
+++ b/.gitignore
@@ -158,3 +158,4 @@ cython_debug/
 #  and can be added to the global gitignore or merged into this file.  For a more nuclear
 #  option (not recommended) you can uncomment the following to ignore the entire idea folder.
 #.idea/
+sandbox
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 00000000..042317ca
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,25 @@
+{
+  "name": "json-schema-test-suite",
+  "version": "0.1.0",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "json-schema-test-suite",
+      "version": "0.1.0",
+      "license": "MIT",
+      "dependencies": {
+        "jsonschema": "^1.5.0"
+      }
+    },
+    "node_modules/jsonschema": {
+      "version": "1.5.0",
+      "resolved": "https://registry.npmjs.org/jsonschema/-/jsonschema-1.5.0.tgz",
+      "integrity": "sha512-K+A9hhqbn0f3pJX17Q/7H6yQfD/5OXgdrR5UE12gMXCiN9D5Xq2o5mddV2QEcX/bjla99ASsAAQUyMCCRWAEhw==",
+      "license": "MIT",
+      "engines": {
+        "node": "*"
+      }
+    }
+  }
+}
diff --git a/package.json b/package.json
index 75da9e29..c78224fa 100644
--- a/package.json
+++ b/package.json
@@ -8,5 +8,8 @@
     "tests"
   ],
   "author": "http://json-schema.org",
-  "license": "MIT"
+  "license": "MIT",
+  "dependencies": {
+    "jsonschema": "^1.5.0"
+  }
 }
diff --git a/tests/draft3/format.json b/tests/draft3/format.json
index a5447c90..fef313d9 100644
--- a/tests/draft3/format.json
+++ b/tests/draft3/format.json
@@ -32,6 +32,31 @@
                 "description": "all string formats ignore nulls",
                 "data": null,
                 "valid": true
+            },
+            {
+                "description": "User with double dot in email",
+                "data": "user@example..com",
+                "valid": false
+            },
+            {
+                "description": "User uses a specific domain",
+                "data": "user@",
+                "valid": false
+            },
+            {
+                "description": "Invalid email with space",
+                "data": "user name@example.com",
+                "valid": false
+            },
+            {
+                "description": "Invalid email with no spec interpretation",
+                "data": "user@localhost",
+                "valid": false
+            },
+            {
+                "description": "Invalid email with unwanted special symbols",
+                "data": "user//@example.com",
+                "valid": false
             }
         ]
     },
@@ -69,6 +94,7 @@
                 "data": null,
                 "valid": true
             }
+
         ]
     },
     {