diff --git a/tests/queries/0_stateless/02863_decode_html_component.reference b/tests/queries/0_stateless/02863_decode_html_component.reference
new file mode 100644
index 00000000000..3749c14591a
--- /dev/null
+++ b/tests/queries/0_stateless/02863_decode_html_component.reference
@@ -0,0 +1,22 @@
+Hello, "world"!
+<123>
+&clickhouse
+\'foo\'
+Hello, && world
+Hello, &;& world
+Hello, &a;& world
+Hello, &ltt;& world
+Hello, &ltt& world
+Hello, &t;& world
+ !"#$%&\'()*+,-./012
+)*+,-./0123456789:;<
+=>?@ABCDEFGHIJKLMNOP
+为
+为
+&#12345678;\'123
+ЦЦЮЮЫㄱ
+C𝓁𝒾𝒸𝓀𝐻𝑜𝓊𝓈𝑒
+C𝓁𝒾𝒸𝓀𝐻𝑜𝓊𝓈&#x1d452
+C𝓁𝒾𝒸𝓀𝐻𝑜𝓊𝓈&#x1d452{
+
+C
diff --git a/tests/queries/0_stateless/02863_decode_html_component.sql b/tests/queries/0_stateless/02863_decode_html_component.sql
new file mode 100644
index 00000000000..0eb4653e38b
--- /dev/null
+++ b/tests/queries/0_stateless/02863_decode_html_component.sql
@@ -0,0 +1,24 @@
+SELECT decodeHTMLComponent('Hello, &quot;world&quot;!');
+SELECT decodeHTMLComponent('&lt;123&gt;');
+SELECT decodeHTMLComponent('&amp;clickhouse');
+SELECT decodeHTMLComponent('&apos;foo&apos;');
+SELECT decodeHTMLComponent('Hello, &&amp; world');
+SELECT decodeHTMLComponent('Hello, &;&amp; world');
+SELECT decodeHTMLComponent('Hello, &a;&amp; world');
+SELECT decodeHTMLComponent('Hello, &ltt;&amp; world');
+SELECT decodeHTMLComponent('Hello, &ltt&amp; world');
+SELECT decodeHTMLComponent('Hello, &t;&amp; world');
+
+SELECT decodeHTMLComponent('&#32;&#33;&#34;&#35;&#36;&#37;&#38;&#39;&#40;&#41;&#42;&#43;&#44;&#45;&#46;&#47;&#48;&#49;&#50;');
+SELECT decodeHTMLComponent('&#41;&#42;&#43;&#44;&#45;&#46;&#47;&#48;&#49;&#50;&#51;&#52;&#53;&#54;&#55;&#56;&#57;&#58;&#59;&#60;');
+SELECT decodeHTMLComponent('&#61;&#62;&#63;&#64;&#65;&#66;&#67;&#68;&#69;&#70;&#71;&#72;&#73;&#74;&#75;&#76;&#77;&#78;&#79;&#80;');
+SELECT decodeHTMLComponent('&#20026;');
+SELECT decodeHTMLComponent('&#x4e3a;');
+SELECT decodeHTMLComponent('&#12345678;&apos;123');
+SELECT decodeHTMLComponent('&#x0426;&#X0426;&#x042E;&#X042e;&#x042B;&#x3131;');
+SELECT decodeHTMLComponent('C&lscr;&iscr;&cscr;&kscr;&#x1d43b;&#x1d45c;&uscr;&sscr;&#x1d452;');
+SELECT decodeHTMLComponent('C&lscr;&iscr;&cscr;&kscr;&#x1d43b;&#x1d45c;&uscr;&sscr;&#x1d452');
+SELECT decodeHTMLComponent('C&lscr;&iscr;&cscr;&kscr;&#x1d43b;&#x1d45c;&uscr;&sscr;&#x1d452&#123;');
+SELECT decodeHTMLComponent('');
+SELECT decodeHTMLComponent('C');
+