 			expect(parsedGraph).to(equal(expectedGraph))
 		}
 
-		it("should parse siblings") {
+		// TODO: Not yet supported. See Carthage/ogdl-swift#6.
+		pending("should parse siblings") {
 			let expectedGraph = [
 				Node(value: "foo", children: [
 					Node(value: "bar")

			expect(parsedGraph).to(equal(expectedGraph))
		}

		it("should parse grouped siblings with children") {
			let expectedGraph = [
				Node(value: "foo", children: [
					Node(value: "bar.o", children: [ Node(value: "1.2") ]),

			expect(parsedGraph).to(equal(expectedGraph))
		}

		// TODO: Not yet supported. See Carthage/ogdl-swift#7.
		pending("should parse grouped siblings") {
			let expectedGraph = [
				Node(value: "foo", children: [
					Node(value: "bar"),
