diff --git a/lib/language.js b/lib/language.js
index bfdec31e8..40d233bcb 100755
--- a/lib/language.js
+++ b/lib/language.js
@@ -126,7 +126,7 @@ exports.errors = {
         },
         email: 'must be a valid email',
         uri: 'must be a valid uri',
-        uriRelativeOnly: 'must be a relative only uri',
+        uriRelativeOnly: 'must be a valid relative uri',
         uriCustomScheme: 'must be a valid uri with a scheme matching the {{scheme}} pattern',
         isoDate: 'must be a valid ISO 8601 date',
         guid: 'must be a valid GUID',
diff --git a/test/string.js b/test/string.js
index 72bed3788..dea1dc9cb 100755
--- a/test/string.js
+++ b/test/string.js
@@ -1852,102 +1852,102 @@ describe('string', () => {
 
             const schema = Joi.string().uri({ relativeOnly: true });
             Helper.validate(schema, [
-                ['foo://example.com:8042/over/there?name=ferret#nose', false, null, '"value" must be a relative only uri'],
-                ['urn:example:animal:ferret:nose', false, null, '"value" must be a relative only uri'],
-                ['ftp://ftp.is.co.za/rfc/rfc1808.txt', false, null, '"value" must be a relative only uri'],
-                ['http://www.ietf.org/rfc/rfc2396.txt', false, null, '"value" must be a relative only uri'],
-                ['ldap://[2001:db8::7]/c=GB?objectClass?one', false, null, '"value" must be a relative only uri'],
-                ['mailto:John.Doe@example.com', false, null, '"value" must be a relative only uri'],
-                ['news:comp.infosystems.www.servers.unix', false, null, '"value" must be a relative only uri'],
-                ['tel:+1-816-555-1212', false, null, '"value" must be a relative only uri'],
-                ['telnet://192.0.2.16:80/', false, null, '"value" must be a relative only uri'],
-                ['urn:oasis:names:specification:docbook:dtd:xml:4.1.2', false, null, '"value" must be a relative only uri'],
-                ['file:///example.txt', false, null, '"value" must be a relative only uri'],
-                ['http://asdf:qw%20er@localhost:8000?asdf=12345&asda=fc%2F#bacon', false, null, '"value" must be a relative only uri'],
-                ['http://asdf@localhost:8000', false, null, '"value" must be a relative only uri'],
-                ['http://[v1.09azAZ-._~!$&\'()*+,;=:]', false, null, '"value" must be a relative only uri'],
-                ['http://[a:b:c:d:e::1.2.3.4]', false, null, '"value" must be a relative only uri'],
-                ['coap://[FEDC:BA98:7654:3210:FEDC:BA98:7654:3210]', false, null, '"value" must be a relative only uri'],
-                ['http://[1080:0:0:0:8:800:200C:417A]', false, null, '"value" must be a relative only uri'],
-                ['http://127.0.0.1:8000/foo?bar', false, null, '"value" must be a relative only uri'],
-                ['http://asdf:qwer@localhost:8000', false, null, '"value" must be a relative only uri'],
-                ['http://user:pass%3A@localhost:80', false, null, '"value" must be a relative only uri'],
-                ['http://localhost:123', false, null, '"value" must be a relative only uri'],
-                ['https://localhost:123', false, null, '"value" must be a relative only uri'],
-                ['file:///whatever', false, null, '"value" must be a relative only uri'],
-                ['mailto:asdf@asdf.com', false, null, '"value" must be a relative only uri'],
-                ['ftp://www.example.com', false, null, '"value" must be a relative only uri'],
-                ['javascript:alert(\'hello\');', false, null, '"value" must be a relative only uri'], // eslint-disable-line no-script-url
-                ['xmpp:isaacschlueter@jabber.org', false, null, '"value" must be a relative only uri'],
-                ['f://some.host/path', false, null, '"value" must be a relative only uri'],
-                ['http://localhost:18/asdf', false, null, '"value" must be a relative only uri'],
-                ['http://localhost:42/asdf?qwer=zxcv', false, null, '"value" must be a relative only uri'],
-                ['HTTP://www.example.com/', false, null, '"value" must be a relative only uri'],
-                ['HTTP://www.example.com', false, null, '"value" must be a relative only uri'],
-                ['http://www.ExAmPlE.com/', false, null, '"value" must be a relative only uri'],
-                ['http://user:pw@www.ExAmPlE.com/', false, null, '"value" must be a relative only uri'],
-                ['http://USER:PW@www.ExAmPlE.com/', false, null, '"value" must be a relative only uri'],
-                ['http://user@www.example.com/', false, null, '"value" must be a relative only uri'],
-                ['http://user%3Apw@www.example.com/', false, null, '"value" must be a relative only uri'],
-                ['http://x.com/path?that%27s#all,%20folks', false, null, '"value" must be a relative only uri'],
-                ['HTTP://X.COM/Y', false, null, '"value" must be a relative only uri'],
-                ['http://www.narwhaljs.org/blog/categories?id=news', false, null, '"value" must be a relative only uri'],
-                ['http://mt0.google.com/vt/lyrs=m@114&hl=en&src=api&x=2&y=2&z=3&s=', false, null, '"value" must be a relative only uri'],
-                ['http://mt0.google.com/vt/lyrs=m@114???&hl=en&src=api&x=2&y=2&z=3&s=', false, null, '"value" must be a relative only uri'],
-                ['http://user:pass@mt0.google.com/vt/lyrs=m@114???&hl=en&src=api&x=2&y=2&z=3&s=', false, null, '"value" must be a relative only uri'],
-                ['http://_jabber._tcp.google.com:80/test', false, null, '"value" must be a relative only uri'],
-                ['http://user:pass@_jabber._tcp.google.com:80/test', false, null, '"value" must be a relative only uri'],
-                ['http://[fe80::1]/a/b?a=b#abc', false, null, '"value" must be a relative only uri'],
-                ['http://user:password@[3ffe:2a00:100:7031::1]:8080', false, null, '"value" must be a relative only uri'],
-                ['coap://[1080:0:0:0:8:800:200C:417A]:61616/', false, null, '"value" must be a relative only uri'],
-                ['git+http://github.com/joyent/node.git', false, null, '"value" must be a relative only uri'],
-                ['http://bucket_name.s3.amazonaws.com/image.jpg', false, null, '"value" must be a relative only uri'],
-                ['dot.test://foo/bar', false, null, '"value" must be a relative only uri'],
-                ['svn+ssh://foo/bar', false, null, '"value" must be a relative only uri'],
-                ['dash-test://foo/bar', false, null, '"value" must be a relative only uri'],
-                ['xmpp:isaacschlueter@jabber.org', false, null, '"value" must be a relative only uri'],
-                ['http://atpass:foo%40bar@127.0.0.1:8080/path?search=foo#bar', false, null, '"value" must be a relative only uri'],
-                ['javascript:alert(\'hello\');', false, null, '"value" must be a relative only uri'], // eslint-disable-line no-script-url
-                ['file://localhost/etc/node/', false, null, '"value" must be a relative only uri'],
-                ['file:///etc/node/', false, null, '"value" must be a relative only uri'],
-                ['http://USER:PW@www.ExAmPlE.com/', false, null, '"value" must be a relative only uri'],
-                ['mailto:local1@domain1?query1', false, null, '"value" must be a relative only uri'],
-                ['http://example/a/b?c/../d', false, null, '"value" must be a relative only uri'],
-                ['http://example/x%2Fabc', false, null, '"value" must be a relative only uri'],
-                ['http://a/b/c/d;p=1/g;x=1/y', false, null, '"value" must be a relative only uri'],
-                ['http://a/b/c/g#s/../x', false, null, '"value" must be a relative only uri'],
-                ['http://a/b/c/.foo', false, null, '"value" must be a relative only uri'],
-                ['http://example.com/b//c//d;p?q#blarg', false, null, '"value" must be a relative only uri'],
-                ['g:h', false, null, '"value" must be a relative only uri'],
-                ['http://a/b/c/g', false, null, '"value" must be a relative only uri'],
-                ['http://a/b/c/g/', false, null, '"value" must be a relative only uri'],
-                ['http://a/g', false, null, '"value" must be a relative only uri'],
-                ['http://g', false, null, '"value" must be a relative only uri'],
-                ['http://a/b/c/d;p?y', false, null, '"value" must be a relative only uri'],
-                ['http://a/b/c/g?y', false, null, '"value" must be a relative only uri'],
-                ['http://a/b/c/d;p?q#s', false, null, '"value" must be a relative only uri'],
-                ['http://a/b/c/g#s', false, null, '"value" must be a relative only uri'],
-                ['http://a/b/c/g?y#s', false, null, '"value" must be a relative only uri'],
-                ['http://a/b/c/;x', false, null, '"value" must be a relative only uri'],
-                ['http://a/b/c/g;x', false, null, '"value" must be a relative only uri'],
-                ['http://a/b/c/g;x?y#s', false, null, '"value" must be a relative only uri'],
-                ['http://a/b/c/d;p?q', false, null, '"value" must be a relative only uri'],
-                ['http://a/b/c/', false, null, '"value" must be a relative only uri'],
-                ['http://a/b/', false, null, '"value" must be a relative only uri'],
-                ['http://a/b/g', false, null, '"value" must be a relative only uri'],
-                ['http://a/', false, null, '"value" must be a relative only uri'],
-                ['http://a/g', false, null, '"value" must be a relative only uri'],
-                ['http://a/g', false, null, '"value" must be a relative only uri'],
-                ['file:/asda', false, null, '"value" must be a relative only uri'],
+                ['foo://example.com:8042/over/there?name=ferret#nose', false, null, '"value" must be a valid relative uri'],
+                ['urn:example:animal:ferret:nose', false, null, '"value" must be a valid relative uri'],
+                ['ftp://ftp.is.co.za/rfc/rfc1808.txt', false, null, '"value" must be a valid relative uri'],
+                ['http://www.ietf.org/rfc/rfc2396.txt', false, null, '"value" must be a valid relative uri'],
+                ['ldap://[2001:db8::7]/c=GB?objectClass?one', false, null, '"value" must be a valid relative uri'],
+                ['mailto:John.Doe@example.com', false, null, '"value" must be a valid relative uri'],
+                ['news:comp.infosystems.www.servers.unix', false, null, '"value" must be a valid relative uri'],
+                ['tel:+1-816-555-1212', false, null, '"value" must be a valid relative uri'],
+                ['telnet://192.0.2.16:80/', false, null, '"value" must be a valid relative uri'],
+                ['urn:oasis:names:specification:docbook:dtd:xml:4.1.2', false, null, '"value" must be a valid relative uri'],
+                ['file:///example.txt', false, null, '"value" must be a valid relative uri'],
+                ['http://asdf:qw%20er@localhost:8000?asdf=12345&asda=fc%2F#bacon', false, null, '"value" must be a valid relative uri'],
+                ['http://asdf@localhost:8000', false, null, '"value" must be a valid relative uri'],
+                ['http://[v1.09azAZ-._~!$&\'()*+,;=:]', false, null, '"value" must be a valid relative uri'],
+                ['http://[a:b:c:d:e::1.2.3.4]', false, null, '"value" must be a valid relative uri'],
+                ['coap://[FEDC:BA98:7654:3210:FEDC:BA98:7654:3210]', false, null, '"value" must be a valid relative uri'],
+                ['http://[1080:0:0:0:8:800:200C:417A]', false, null, '"value" must be a valid relative uri'],
+                ['http://127.0.0.1:8000/foo?bar', false, null, '"value" must be a valid relative uri'],
+                ['http://asdf:qwer@localhost:8000', false, null, '"value" must be a valid relative uri'],
+                ['http://user:pass%3A@localhost:80', false, null, '"value" must be a valid relative uri'],
+                ['http://localhost:123', false, null, '"value" must be a valid relative uri'],
+                ['https://localhost:123', false, null, '"value" must be a valid relative uri'],
+                ['file:///whatever', false, null, '"value" must be a valid relative uri'],
+                ['mailto:asdf@asdf.com', false, null, '"value" must be a valid relative uri'],
+                ['ftp://www.example.com', false, null, '"value" must be a valid relative uri'],
+                ['javascript:alert(\'hello\');', false, null, '"value" must be a valid relative uri'], // eslint-disable-line no-script-url
+                ['xmpp:isaacschlueter@jabber.org', false, null, '"value" must be a valid relative uri'],
+                ['f://some.host/path', false, null, '"value" must be a valid relative uri'],
+                ['http://localhost:18/asdf', false, null, '"value" must be a valid relative uri'],
+                ['http://localhost:42/asdf?qwer=zxcv', false, null, '"value" must be a valid relative uri'],
+                ['HTTP://www.example.com/', false, null, '"value" must be a valid relative uri'],
+                ['HTTP://www.example.com', false, null, '"value" must be a valid relative uri'],
+                ['http://www.ExAmPlE.com/', false, null, '"value" must be a valid relative uri'],
+                ['http://user:pw@www.ExAmPlE.com/', false, null, '"value" must be a valid relative uri'],
+                ['http://USER:PW@www.ExAmPlE.com/', false, null, '"value" must be a valid relative uri'],
+                ['http://user@www.example.com/', false, null, '"value" must be a valid relative uri'],
+                ['http://user%3Apw@www.example.com/', false, null, '"value" must be a valid relative uri'],
+                ['http://x.com/path?that%27s#all,%20folks', false, null, '"value" must be a valid relative uri'],
+                ['HTTP://X.COM/Y', false, null, '"value" must be a valid relative uri'],
+                ['http://www.narwhaljs.org/blog/categories?id=news', false, null, '"value" must be a valid relative uri'],
+                ['http://mt0.google.com/vt/lyrs=m@114&hl=en&src=api&x=2&y=2&z=3&s=', false, null, '"value" must be a valid relative uri'],
+                ['http://mt0.google.com/vt/lyrs=m@114???&hl=en&src=api&x=2&y=2&z=3&s=', false, null, '"value" must be a valid relative uri'],
+                ['http://user:pass@mt0.google.com/vt/lyrs=m@114???&hl=en&src=api&x=2&y=2&z=3&s=', false, null, '"value" must be a valid relative uri'],
+                ['http://_jabber._tcp.google.com:80/test', false, null, '"value" must be a valid relative uri'],
+                ['http://user:pass@_jabber._tcp.google.com:80/test', false, null, '"value" must be a valid relative uri'],
+                ['http://[fe80::1]/a/b?a=b#abc', false, null, '"value" must be a valid relative uri'],
+                ['http://user:password@[3ffe:2a00:100:7031::1]:8080', false, null, '"value" must be a valid relative uri'],
+                ['coap://[1080:0:0:0:8:800:200C:417A]:61616/', false, null, '"value" must be a valid relative uri'],
+                ['git+http://github.com/joyent/node.git', false, null, '"value" must be a valid relative uri'],
+                ['http://bucket_name.s3.amazonaws.com/image.jpg', false, null, '"value" must be a valid relative uri'],
+                ['dot.test://foo/bar', false, null, '"value" must be a valid relative uri'],
+                ['svn+ssh://foo/bar', false, null, '"value" must be a valid relative uri'],
+                ['dash-test://foo/bar', false, null, '"value" must be a valid relative uri'],
+                ['xmpp:isaacschlueter@jabber.org', false, null, '"value" must be a valid relative uri'],
+                ['http://atpass:foo%40bar@127.0.0.1:8080/path?search=foo#bar', false, null, '"value" must be a valid relative uri'],
+                ['javascript:alert(\'hello\');', false, null, '"value" must be a valid relative uri'], // eslint-disable-line no-script-url
+                ['file://localhost/etc/node/', false, null, '"value" must be a valid relative uri'],
+                ['file:///etc/node/', false, null, '"value" must be a valid relative uri'],
+                ['http://USER:PW@www.ExAmPlE.com/', false, null, '"value" must be a valid relative uri'],
+                ['mailto:local1@domain1?query1', false, null, '"value" must be a valid relative uri'],
+                ['http://example/a/b?c/../d', false, null, '"value" must be a valid relative uri'],
+                ['http://example/x%2Fabc', false, null, '"value" must be a valid relative uri'],
+                ['http://a/b/c/d;p=1/g;x=1/y', false, null, '"value" must be a valid relative uri'],
+                ['http://a/b/c/g#s/../x', false, null, '"value" must be a valid relative uri'],
+                ['http://a/b/c/.foo', false, null, '"value" must be a valid relative uri'],
+                ['http://example.com/b//c//d;p?q#blarg', false, null, '"value" must be a valid relative uri'],
+                ['g:h', false, null, '"value" must be a valid relative uri'],
+                ['http://a/b/c/g', false, null, '"value" must be a valid relative uri'],
+                ['http://a/b/c/g/', false, null, '"value" must be a valid relative uri'],
+                ['http://a/g', false, null, '"value" must be a valid relative uri'],
+                ['http://g', false, null, '"value" must be a valid relative uri'],
+                ['http://a/b/c/d;p?y', false, null, '"value" must be a valid relative uri'],
+                ['http://a/b/c/g?y', false, null, '"value" must be a valid relative uri'],
+                ['http://a/b/c/d;p?q#s', false, null, '"value" must be a valid relative uri'],
+                ['http://a/b/c/g#s', false, null, '"value" must be a valid relative uri'],
+                ['http://a/b/c/g?y#s', false, null, '"value" must be a valid relative uri'],
+                ['http://a/b/c/;x', false, null, '"value" must be a valid relative uri'],
+                ['http://a/b/c/g;x', false, null, '"value" must be a valid relative uri'],
+                ['http://a/b/c/g;x?y#s', false, null, '"value" must be a valid relative uri'],
+                ['http://a/b/c/d;p?q', false, null, '"value" must be a valid relative uri'],
+                ['http://a/b/c/', false, null, '"value" must be a valid relative uri'],
+                ['http://a/b/', false, null, '"value" must be a valid relative uri'],
+                ['http://a/b/g', false, null, '"value" must be a valid relative uri'],
+                ['http://a/', false, null, '"value" must be a valid relative uri'],
+                ['http://a/g', false, null, '"value" must be a valid relative uri'],
+                ['http://a/g', false, null, '"value" must be a valid relative uri'],
+                ['file:/asda', false, null, '"value" must be a valid relative uri'],
                 ['qwerty', true],
-                ['invalid uri', false, null, '"value" must be a relative only uri'],
-                ['1http://google.com', false, null, '"value" must be a relative only uri'],
-                ['http://testdomain`,.<>/?\'";{}][++\\|~!@#$%^&*().org', false, null, '"value" must be a relative only uri'],
+                ['invalid uri', false, null, '"value" must be a valid relative uri'],
+                ['1http://google.com', false, null, '"value" must be a valid relative uri'],
+                ['http://testdomain`,.<>/?\'";{}][++\\|~!@#$%^&*().org', false, null, '"value" must be a valid relative uri'],
                 ['', false, null, '"value" is not allowed to be empty'],
-                ['(╯°□°)╯︵ ┻━┻', false, null, '"value" must be a relative only uri'],
+                ['(╯°□°)╯︵ ┻━┻', false, null, '"value" must be a valid relative uri'],
                 ['one/two/three?value=abc&value2=123#david-rules', true],
                 ['//username:password@test.example.com/one/two/three?value=abc&value2=123#david-rules', true],
-                ['http://a\r" \t\n<\'b:b@c\r\nd/e?f', false, null, '"value" must be a relative only uri'],
+                ['http://a\r" \t\n<\'b:b@c\r\nd/e?f', false, null, '"value" must be a valid relative uri'],
                 ['/absolute', true]
             ], done);
         });