diff --git a/src/dom/document.zig b/src/dom/document.zig
index e55469d5..b5e57a10 100644
--- a/src/dom/document.zig
+++ b/src/dom/document.zig
@@ -83,11 +83,6 @@ pub fn testExecFn(
         .{ .src = "let getElementsByTagNameAll = document.getElementsByTagName('*')", .ex = "undefined" },
         .{ .src = "getElementsByTagNameAll.length", .ex = "8" },
         .{ .src = "getElementsByTagNameAll.item(0).localName", .ex = "html" },
-        .{ .src = "getElementsByTagNameAll.item(0).localName", .ex = "html" },
-        .{ .src = "getElementsByTagNameAll.item(1).localName", .ex = "head" },
-        .{ .src = "getElementsByTagNameAll.item(0).localName", .ex = "html" },
-        .{ .src = "getElementsByTagNameAll.item(2).localName", .ex = "body" },
-        .{ .src = "getElementsByTagNameAll.item(3).localName", .ex = "div" },
         .{ .src = "getElementsByTagNameAll.item(7).localName", .ex = "p" },
         .{ .src = "getElementsByTagNameAll.namedItem('para-empty-child').localName", .ex = "span" },
     };
diff --git a/src/dom/html_collection.zig b/src/dom/html_collection.zig
index 039ea62e..04e81fa9 100644
--- a/src/dom/html_collection.zig
+++ b/src/dom/html_collection.zig
@@ -3,6 +3,8 @@ const std = @import("std");
 const parser = @import("../netsurf.zig");
 
 const jsruntime = @import("jsruntime");
+const Case = jsruntime.test_utils.Case;
+const checkCases = jsruntime.test_utils.checkCases;
 
 const utils = @import("utils.z");
 const Element = @import("element.zig").Element;
@@ -178,3 +180,30 @@ pub const HTMLCollection = struct {
         return null;
     }
 };
+
+// Tests
+// -----
+
+pub fn testExecFn(
+    _: std.mem.Allocator,
+    js_env: *jsruntime.Env,
+    comptime _: []jsruntime.API,
+) !void {
+    var getElementsByTagName = [_]Case{
+        .{ .src = "let getElementsByTagName = document.getElementsByTagName('p')", .ex = "undefined" },
+        .{ .src = "getElementsByTagName.length", .ex = "2" },
+        .{ .src = "getElementsByTagName.item(0).localName", .ex = "p" },
+        .{ .src = "getElementsByTagName.item(1).localName", .ex = "p" },
+        .{ .src = "let getElementsByTagNameAll = document.getElementsByTagName('*')", .ex = "undefined" },
+        .{ .src = "getElementsByTagNameAll.length", .ex = "8" },
+        .{ .src = "getElementsByTagNameAll.item(0).localName", .ex = "html" },
+        .{ .src = "getElementsByTagNameAll.item(0).localName", .ex = "html" },
+        .{ .src = "getElementsByTagNameAll.item(1).localName", .ex = "head" },
+        .{ .src = "getElementsByTagNameAll.item(0).localName", .ex = "html" },
+        .{ .src = "getElementsByTagNameAll.item(2).localName", .ex = "body" },
+        .{ .src = "getElementsByTagNameAll.item(3).localName", .ex = "div" },
+        .{ .src = "getElementsByTagNameAll.item(7).localName", .ex = "p" },
+        .{ .src = "getElementsByTagNameAll.namedItem('para-empty-child').localName", .ex = "span" },
+    };
+    try checkCases(js_env, &getElementsByTagName);
+}
diff --git a/src/run_tests.zig b/src/run_tests.zig
index 8860bc67..b5ad7159 100644
--- a/src/run_tests.zig
+++ b/src/run_tests.zig
@@ -11,6 +11,7 @@ const HTMLDocumentTestExecFn = @import("html/document.zig").testExecFn;
 const nodeTestExecFn = @import("dom/node.zig").testExecFn;
 const characterDataTestExecFn = @import("dom/character_data.zig").testExecFn;
 const textTestExecFn = @import("dom/text.zig").testExecFn;
+const HTMLCollectionTestExecFn = @import("dom/html_collection.zig").testExecFn;
 
 var doc: *parser.DocumentHTML = undefined;
 
@@ -51,6 +52,7 @@ fn testsAllExecFn(
         nodeTestExecFn,
         characterDataTestExecFn,
         textTestExecFn,
+        HTMLCollectionTestExecFn,
     };
 
     inline for (testFns) |testFn| {