diff --git a/packages/core/test/linker/integration_spec.ts b/packages/core/test/linker/integration_spec.ts
index ef8343d4db..fbe76fb9ab 100644
--- a/packages/core/test/linker/integration_spec.ts
+++ b/packages/core/test/linker/integration_spec.ts
@@ -1852,25 +1852,24 @@ function declareTests(config?: {useJit: boolean}) {
               expect(firstAttribute.namespaceURI).toEqual('http://www.w3.org/1999/xlink');
             });
 
-        fixmeIvy('FW-811: Align HTML namespaces between Ivy and Render2')
-            .it('should support foreignObjects with document fragments', () => {
-              TestBed.configureTestingModule({declarations: [MyComp]});
-              const template =
-                  '<svg><foreignObject><xhtml:div><p>Test</p></xhtml:div></foreignObject></svg>';
-              TestBed.overrideComponent(MyComp, {set: {template}});
-              const fixture = TestBed.createComponent(MyComp);
+        it('should support foreignObjects with document fragments', () => {
+          TestBed.configureTestingModule({declarations: [MyComp]});
+          const template =
+              '<svg><foreignObject><xhtml:div><p>Test</p></xhtml:div></foreignObject></svg>';
+          TestBed.overrideComponent(MyComp, {set: {template}});
+          const fixture = TestBed.createComponent(MyComp);
 
-              const el = fixture.nativeElement;
-              const svg = getDOM().childNodes(el)[0];
-              const foreignObject = getDOM().childNodes(svg)[0];
-              const p = getDOM().childNodes(foreignObject)[0];
-              expect(getDOM().getProperty(<Element>svg, 'namespaceURI'))
-                  .toEqual('http://www.w3.org/2000/svg');
-              expect(getDOM().getProperty(<Element>foreignObject, 'namespaceURI'))
-                  .toEqual('http://www.w3.org/2000/svg');
-              expect(getDOM().getProperty(<Element>p, 'namespaceURI'))
-                  .toEqual('http://www.w3.org/1999/xhtml');
-            });
+          const el = fixture.nativeElement;
+          const svg = getDOM().childNodes(el)[0];
+          const foreignObject = getDOM().childNodes(svg)[0];
+          const p = getDOM().childNodes(foreignObject)[0];
+          expect(getDOM().getProperty(<Element>svg, 'namespaceURI'))
+              .toEqual('http://www.w3.org/2000/svg');
+          expect(getDOM().getProperty(<Element>foreignObject, 'namespaceURI'))
+              .toEqual('http://www.w3.org/2000/svg');
+          expect(getDOM().getProperty(<Element>p, 'namespaceURI'))
+              .toEqual('http://www.w3.org/1999/xhtml');
+        });
       });
 
       describe('attributes', () => {
diff --git a/packages/platform-browser/src/dom/dom_renderer.ts b/packages/platform-browser/src/dom/dom_renderer.ts
index 4c32f03c43..719ddce74e 100644
--- a/packages/platform-browser/src/dom/dom_renderer.ts
+++ b/packages/platform-browser/src/dom/dom_renderer.ts
@@ -111,7 +111,9 @@ class DefaultDomRenderer2 implements Renderer2 {
 
   createElement(name: string, namespace?: string): any {
     if (namespace) {
-      return document.createElementNS(NAMESPACE_URIS[namespace], name);
+      // In cases where Ivy (not ViewEngine) is giving us the actual namespace, the look up by key
+      // will result in undefined, so we just return the namespace here.
+      return document.createElementNS(NAMESPACE_URIS[namespace] || namespace, name);
     }
 
     return document.createElement(name);
@@ -154,6 +156,8 @@ class DefaultDomRenderer2 implements Renderer2 {
   setAttribute(el: any, name: string, value: string, namespace?: string): void {
     if (namespace) {
       name = `${namespace}:${name}`;
+      // TODO(benlesh): Ivy may cause issues here because it's passing around
+      // full URIs for namespaces, therefore this lookup will fail.
       const namespaceUri = NAMESPACE_URIS[namespace];
       if (namespaceUri) {
         el.setAttributeNS(namespaceUri, name, value);
@@ -167,10 +171,15 @@ class DefaultDomRenderer2 implements Renderer2 {
 
   removeAttribute(el: any, name: string, namespace?: string): void {
     if (namespace) {
+      // TODO(benlesh): Ivy may cause issues here because it's passing around
+      // full URIs for namespaces, therefore this lookup will fail.
       const namespaceUri = NAMESPACE_URIS[namespace];
       if (namespaceUri) {
         el.removeAttributeNS(namespaceUri, name);
       } else {
+        // TODO(benlesh): Since ivy is passing around full URIs for namespaces
+        // this could result in properties like `http://www.w3.org/2000/svg:cx="123"`,
+        // which is wrong.
         el.removeAttribute(`${namespace}:${name}`);
       }
     } else {