diff --git a/src/events/event.zig b/src/events/event.zig
index f192430d..83f12824 100644
--- a/src/events/event.zig
+++ b/src/events/event.zig
@@ -13,12 +13,12 @@ const DOMException = @import("../dom/exceptions.zig").DOMException;
 const EventTarget = @import("../dom/event_target.zig").EventTarget;
 const EventTargetUnion = @import("../dom/event_target.zig").Union;
 
-const xhr = @import("../xhr/xhr.zig");
+const ProgressEvent = @import("../xhr/progress_event.zig").ProgressEvent;
 
 // Event interfaces
 pub const Interfaces = generate.Tuple(.{
     Event,
-    xhr.ProgressEvent,
+    ProgressEvent,
 });
 const Generated = generate.Union.compile(Interfaces);
 pub const Union = Generated._union;
@@ -41,7 +41,7 @@ pub const Event = struct {
     pub fn toInterface(evt: *parser.Event) !Union {
         return switch (try parser.eventGetInternalType(evt)) {
             .event => .{ .Event = evt },
-            .progress_event => .{ .ProgressEvent = @as(*xhr.ProgressEvent, @ptrCast(evt)).* },
+            .progress_event => .{ .ProgressEvent = @as(*ProgressEvent, @ptrCast(evt)).* },
         };
     }
 
diff --git a/src/run_tests.zig b/src/run_tests.zig
index 4e22c04f..7bebe7b1 100644
--- a/src/run_tests.zig
+++ b/src/run_tests.zig
@@ -7,6 +7,7 @@ const generate = @import("generate.zig");
 const parser = @import("netsurf.zig");
 const apiweb = @import("apiweb.zig");
 const Window = @import("html/window.zig").Window;
+const xhr = @import("xhr/xhr.zig");
 
 const documentTestExecFn = @import("dom/document.zig").testExecFn;
 const HTMLDocumentTestExecFn = @import("html/document.zig").testExecFn;
@@ -23,8 +24,8 @@ const NodeListTestExecFn = @import("dom/nodelist.zig").testExecFn;
 const AttrTestExecFn = @import("dom/attribute.zig").testExecFn;
 const EventTargetTestExecFn = @import("dom/event_target.zig").testExecFn;
 const EventTestExecFn = @import("events/event.zig").testExecFn;
-const xhr = @import("xhr/xhr.zig");
 const XHRTestExecFn = xhr.testExecFn;
+const ProgressEventTestExecFn = @import("xhr/progress_event.zig").testExecFn;
 
 pub const Types = jsruntime.reflect(apiweb.Interfaces);
 
@@ -81,6 +82,7 @@ fn testsAllExecFn(
         EventTargetTestExecFn,
         EventTestExecFn,
         XHRTestExecFn,
+        ProgressEventTestExecFn,
     };
 
     inline for (testFns) |testFn| {
diff --git a/src/xhr/progress_event.zig b/src/xhr/progress_event.zig
new file mode 100644
index 00000000..afdf36a9
--- /dev/null
+++ b/src/xhr/progress_event.zig
@@ -0,0 +1,72 @@
+const std = @import("std");
+
+const jsruntime = @import("jsruntime");
+const Case = jsruntime.test_utils.Case;
+const checkCases = jsruntime.test_utils.checkCases;
+
+const parser = @import("../netsurf.zig");
+const Event = @import("../events/event.zig").Event;
+
+const DOMException = @import("../dom/exceptions.zig").DOMException;
+
+pub const ProgressEvent = struct {
+    pub const prototype = *Event;
+    pub const Exception = DOMException;
+    pub const mem_guarantied = true;
+
+    pub const EventInit = struct {
+        lengthComputable: bool = false,
+        loaded: u64 = 0,
+        total: u64 = 0,
+    };
+
+    proto: parser.Event,
+    lengthComputable: bool,
+    loaded: u64 = 0,
+    total: u64 = 0,
+
+    pub fn constructor(eventType: []const u8, opts: ?EventInit) !ProgressEvent {
+        const event = try parser.eventCreate();
+        defer parser.eventDestroy(event);
+        try parser.eventInit(event, eventType, .{});
+        try parser.eventSetInternalType(event, .progress_event);
+
+        const o = opts orelse EventInit{};
+
+        return .{
+            .proto = event.*,
+            .lengthComputable = o.lengthComputable,
+            .loaded = o.loaded,
+            .total = o.total,
+        };
+    }
+
+    pub fn get_lengthComputable(self: ProgressEvent) bool {
+        return self.lengthComputable;
+    }
+
+    pub fn get_loaded(self: ProgressEvent) u64 {
+        return self.loaded;
+    }
+
+    pub fn get_total(self: ProgressEvent) u64 {
+        return self.total;
+    }
+};
+
+pub fn testExecFn(
+    _: std.mem.Allocator,
+    js_env: *jsruntime.Env,
+) anyerror!void {
+    var progress_event = [_]Case{
+        .{ .src = "let pevt = new ProgressEvent('foo');", .ex = "undefined" },
+        .{ .src = "pevt.loaded", .ex = "0" },
+        .{ .src = "pevt instanceof ProgressEvent", .ex = "true" },
+        .{ .src = "var nnb = 0; var eevt = null; function ccbk(event) { nnb ++; eevt = event; }", .ex = "undefined" },
+        .{ .src = "document.addEventListener('foo', ccbk)", .ex = "undefined" },
+        .{ .src = "document.dispatchEvent(pevt)", .ex = "true" },
+        .{ .src = "eevt.type", .ex = "foo" },
+        .{ .src = "eevt instanceof ProgressEvent", .ex = "true" },
+    };
+    try checkCases(js_env, &progress_event);
+}
diff --git a/src/xhr/xhr.zig b/src/xhr/xhr.zig
index 26a3e4aa..d294c3ef 100644
--- a/src/xhr/xhr.zig
+++ b/src/xhr/xhr.zig
@@ -7,6 +7,7 @@ const generate = @import("../generate.zig");
 
 const EventTarget = @import("../dom/event_target.zig").EventTarget;
 const Event = @import("../events/event.zig").Event;
+const ProgressEvent = @import("progress_event.zig").ProgressEvent;
 const Callback = jsruntime.Callback;
 const DOMError = @import("../netsurf.zig").DOMError;
 const DOMException = @import("../dom/exceptions.zig").DOMException;
@@ -123,51 +124,6 @@ pub const XMLHttpRequestUpload = struct {
     proto: XMLHttpRequestEventTarget = XMLHttpRequestEventTarget{},
 };
 
-pub const ProgressEvent = struct {
-    pub const prototype = *Event;
-    pub const Exception = DOMException;
-    pub const mem_guarantied = true;
-
-    pub const EventInit = struct {
-        lengthComputable: bool = false,
-        loaded: u64 = 0,
-        total: u64 = 0,
-    };
-
-    proto: parser.Event,
-    lengthComputable: bool,
-    loaded: u64 = 0,
-    total: u64 = 0,
-
-    pub fn constructor(eventType: []const u8, opts: ?EventInit) !ProgressEvent {
-        const event = try parser.eventCreate();
-        defer parser.eventDestroy(event);
-        try parser.eventInit(event, eventType, .{});
-        try parser.eventSetInternalType(event, .progress_event);
-
-        const o = opts orelse EventInit{};
-
-        return .{
-            .proto = event.*,
-            .lengthComputable = o.lengthComputable,
-            .loaded = o.loaded,
-            .total = o.total,
-        };
-    }
-
-    pub fn get_lengthComputable(self: ProgressEvent) bool {
-        return self.lengthComputable;
-    }
-
-    pub fn get_loaded(self: ProgressEvent) u64 {
-        return self.loaded;
-    }
-
-    pub fn get_total(self: ProgressEvent) u64 {
-        return self.total;
-    }
-};
-
 pub const XMLHttpRequest = struct {
     pub const prototype = *XMLHttpRequestEventTarget;
     pub const mem_guarantied = true;
@@ -595,16 +551,4 @@ pub fn testExecFn(
         .{ .src = "req.responseText.length > 1024", .ex = "true" },
     };
     try checkCases(js_env, &send);
-
-    var progress_event = [_]Case{
-        .{ .src = "let pevt = new ProgressEvent('foo');", .ex = "undefined" },
-        .{ .src = "pevt.loaded", .ex = "0" },
-        .{ .src = "pevt instanceof ProgressEvent", .ex = "true" },
-        .{ .src = "var nnb = 0; var eevt = null; function ccbk(event) { nnb ++; eevt = event; }", .ex = "undefined" },
-        .{ .src = "document.addEventListener('foo', ccbk)", .ex = "undefined" },
-        .{ .src = "document.dispatchEvent(pevt)", .ex = "true" },
-        .{ .src = "eevt.type", .ex = "foo" },
-        .{ .src = "eevt instanceof ProgressEvent", .ex = "true" },
-    };
-    try checkCases(js_env, &progress_event);
 }