diff --git a/src/parseDomain.js b/src/parseDomain.js
index de42ebd..8db058a 100644
--- a/src/parseDomain.js
+++ b/src/parseDomain.js
@@ -70,8 +70,8 @@ function parseDomain(url, options) {
     }
 
     domain = urlSplit[3]; // domain will now be something like sub.domain.example.com
-
     tld = matchTld(domain, normalizedOptions);
+
     if (tld === null) {
         return null;
     }
@@ -83,7 +83,9 @@ function parseDomain(url, options) {
         // removes the remaining dot, if present (added to handle localhost)
         tld = tld.slice(1);
     }
+
     domain = urlSplit.pop();
+
     const subdomain = urlSplit.join(".");
 
     return {
diff --git a/test/parseDomain.test.js b/test/parseDomain.test.js
index e87d287..bf96656 100644
--- a/test/parseDomain.test.js
+++ b/test/parseDomain.test.js
@@ -141,14 +141,13 @@ describe("parseDomain(url)", () => {
     it("should return null if the given value is not a string", () => {
         expect(parseDomain(undefined)).to.equal(null);
         expect(parseDomain({})).to.equal(null);
-        expect(parseDomain("")).to.equal(null);
-        expect(parseDomain(" ")).to.equal(null);
-        expect(parseDomain("\xa0")).to.equal(null);
     });
 
-    it("should return null if the given value contains invalid characters", () => {
-        expect(parseDomain("http://hell.d\ne.ibm.com")).to.equal(null);
+    it("should return null if the given string is not a valid URL", () => {
         expect(parseDomain("\xa0")).to.equal(null);
+        expect(parseDomain("")).to.equal(null);
+        expect(parseDomain(" ")).to.equal(null);
+        expect(parseDomain("http://hell.d\ne.ibm.com")).to.equal(null);
     });
 
     it("should return null if the given is an empty string with a space character", () => {