diff --git a/ext/lexbor/lexbor/core/str.c b/ext/lexbor/lexbor/core/str.c
index 0f04286bdea56..3b3c574f1d9a9 100644
--- a/ext/lexbor/lexbor/core/str.c
+++ b/ext/lexbor/lexbor/core/str.c
@@ -133,6 +133,10 @@ lexbor_str_append(lexbor_str_t *str, lexbor_mraw_t *mraw,
 {
     lxb_char_t *data_begin;
 
+	if (length == 0) {
+		return str->data;
+	}
+
     lexbor_str_check_size_arg_m(str, lexbor_str_size(str),
                                 mraw, (length + 1), NULL);
 
diff --git a/ext/lexbor/lexbor/url/url.c b/ext/lexbor/lexbor/url/url.c
index bbb3b5bbd3cb7..ed3732a5ccab2 100644
--- a/ext/lexbor/lexbor/url/url.c
+++ b/ext/lexbor/lexbor/url/url.c
@@ -1818,7 +1818,7 @@ lxb_url_parse_basic_h(lxb_url_parser_t *parser, lxb_url_t *url,
                     }
 
                     if (override_state == LXB_URL_STATE_HOSTNAME_STATE) {
-                        lxb_url_parse_return(orig_data, buf, LXB_STATUS_OK);
+                        lxb_url_parse_return(orig_data, buf, LXB_STATUS_ERROR);
                     }
 
                     status = lxb_url_host_parse(parser, begin, p, &url->host,
diff --git a/ext/uri/php_lexbor.c b/ext/uri/php_lexbor.c
index 39b0fb7d09ce3..5287bbcd9023d 100644
--- a/ext/uri/php_lexbor.c
+++ b/ext/uri/php_lexbor.c
@@ -372,7 +372,9 @@ static zend_result lexbor_read_host(const struct uri_internal_t *internal_uri, u
 		smart_str_appendc(&host_str, ']');
 
 		ZVAL_NEW_STR(retval, smart_str_extract(&host_str));
-	} else if (lexbor_uri->host.type != LXB_URL_HOST_TYPE_EMPTY && lexbor_uri->host.type != LXB_URL_HOST_TYPE__UNDEF) {
+	} else if (lexbor_uri->host.type == LXB_URL_HOST_TYPE_EMPTY) {
+		ZVAL_EMPTY_STRING(retval);
+	} else if (lexbor_uri->host.type != LXB_URL_HOST_TYPE__UNDEF) {
 		switch (read_mode) {
 			case URI_COMPONENT_READ_NORMALIZED_UNICODE: {
 				smart_str host_str = {0};
diff --git a/ext/uri/php_uriparser.c b/ext/uri/php_uriparser.c
index 875d72b85241a..ba6f1ce776cb6 100644
--- a/ext/uri/php_uriparser.c
+++ b/ext/uri/php_uriparser.c
@@ -174,7 +174,7 @@ ZEND_ATTRIBUTE_NONNULL static zend_result uriparser_read_host(const uri_internal
 	UriUriA *uriparser_uri = uriparser_read_uri(internal_uri->uri, read_mode);
 	ZEND_ASSERT(uriparser_uri != NULL);
 
-	if (uriparser_uri->hostText.first != NULL && uriparser_uri->hostText.afterLast != NULL && get_text_range_length(&uriparser_uri->hostText) > 0) {
+	if (uriparser_uri->hostText.first != NULL && uriparser_uri->hostText.afterLast != NULL) {
 		if (uriparser_uri->hostData.ip6 != NULL || uriparser_uri->hostData.ipFuture.first != NULL) {
 			/* the textual representation of the host is always accessible in the .hostText field no matter what the host is */
 			smart_str host_str = {0};
diff --git a/ext/uri/tests/003.phpt b/ext/uri/tests/003.phpt
index be607fd6cacef..a1918f7a838b2 100644
--- a/ext/uri/tests/003.phpt
+++ b/ext/uri/tests/003.phpt
@@ -1,5 +1,5 @@
 --TEST--
-Parse URL exotic URLs
+Parse special URIs
 --EXTENSIONS--
 uri
 --FILE--
@@ -8,6 +8,8 @@ uri
 var_dump(Uri\Rfc3986\Uri::parse("http://username:password@héééostname:9090/gah/../path?arg=vaéue#anchor"));
 var_dump(Uri\WhatWg\Url::parse("http://username:password@héééostname:9090/gah/../path?arg=vaéue#anchor"));
 
+var_dump(Uri\Rfc3986\Uri::parse("//host123/"));
+var_dump(Uri\Rfc3986\Uri::parse("///foo/"));
 var_dump(Uri\Rfc3986\Uri::parse("/page:1"));
 var_dump(Uri\WhatWg\Url::parse("/page:1"));
 
@@ -32,6 +34,42 @@ object(Uri\WhatWg\Url)#%d (%d) {
   ["fragment"]=>
   string(6) "anchor"
 }
+object(Uri\Rfc3986\Uri)#%d (%d) {
+  ["scheme"]=>
+  NULL
+  ["username"]=>
+  NULL
+  ["password"]=>
+  NULL
+  ["host"]=>
+  string(7) "host123"
+  ["port"]=>
+  NULL
+  ["path"]=>
+  string(1) "/"
+  ["query"]=>
+  NULL
+  ["fragment"]=>
+  NULL
+}
+object(Uri\Rfc3986\Uri)#%d (%d) {
+  ["scheme"]=>
+  NULL
+  ["username"]=>
+  NULL
+  ["password"]=>
+  NULL
+  ["host"]=>
+  string(0) ""
+  ["port"]=>
+  NULL
+  ["path"]=>
+  string(5) "/foo/"
+  ["query"]=>
+  NULL
+  ["fragment"]=>
+  NULL
+}
 object(Uri\Rfc3986\Uri)#%d (%d) {
   ["scheme"]=>
   NULL
diff --git a/ext/uri/tests/012.phpt b/ext/uri/tests/012.phpt
index 7c14014fb3519..3eb343af535cb 100644
--- a/ext/uri/tests/012.phpt
+++ b/ext/uri/tests/012.phpt
@@ -57,7 +57,7 @@ object(Uri\Rfc3986\Uri)#%d (%d) {
   ["password"]=>
   NULL
   ["host"]=>
-  NULL
+  string(0) ""
   ["port"]=>
   NULL
   ["path"]=>
@@ -75,7 +75,7 @@ object(Uri\WhatWg\Url)#%d (%d) {
   ["password"]=>
   NULL
   ["host"]=>
-  NULL
+  string(0) ""
   ["port"]=>
   NULL
   ["path"]=>
diff --git a/ext/uri/tests/026.phpt b/ext/uri/tests/026.phpt
index 4763ea9d4406c..47a8597fa2e7d 100644
--- a/ext/uri/tests/026.phpt
+++ b/ext/uri/tests/026.phpt
@@ -8,21 +8,27 @@ uri
 $url1 = Uri\WhatWg\Url::parse("https://example.com");
 $url2 = $url1->withHost("test.com");
 $url3 = $url2->withHost("t%65st.com"); // test.com
-$url4 = $url3->withHost("test.com:8080");
+try {
+    $url3->withHost("test.com:8080");
+} catch (Uri\WhatWg\InvalidUrlException $e) {
+    echo $e->getMessage() . "\n";
+}
 
 var_dump($url1->getAsciiHost());
 var_dump($url2->getAsciiHost());
 var_dump($url3->getAsciiHost());
-var_dump($url4->getAsciiHost());
-var_dump($url4->getPort());
 
 try {
-    $url4->withHost("t%3As%2Ft.com"); // t:s/t.com
+    $url3->withHost("t%3As%2Ft.com"); // t:s/t.com
 } catch (Uri\WhatWg\InvalidUrlException $e) {
     echo $e->getMessage() . "\n";
 }
 
-var_dump($url4->withHost("t:s/t.com"));
+try {
+    $url3->withHost("t:s/t.com");     // t:s/t.com
+} catch (Uri\WhatWg\InvalidUrlException $e) {
+    echo $e->getMessage() . "\n";
+}
 
 try {
     $url2->withHost(null);
@@ -38,30 +44,12 @@ var_dump($url2->getAsciiHost());
 
 ?>
 --EXPECTF--
+The specified host is malformed
 string(11) "example.com"
 string(8) "test.com"
 string(8) "test.com"
-string(8) "test.com"
-NULL
 The specified host is malformed (DomainInvalidCodePoint)
-object(Uri\WhatWg\Url)#%d (%d) {
-  ["scheme"]=>
-  string(5) "https"
-  ["username"]=>
-  NULL
-  ["password"]=>
-  NULL
-  ["host"]=>
-  string(8) "test.com"
-  ["port"]=>
-  NULL
-  ["path"]=>
-  string(1) "/"
-  ["query"]=>
-  NULL
-  ["fragment"]=>
-  NULL
-}
+The specified host is malformed
 The specified host is malformed (HostMissing)
 string(7) "foo.com"
 string(8) "test.com"