diff --git a/spec/suites/layer/LayerGroupSpec.js b/spec/suites/layer/LayerGroupSpec.js
index 98ce5e2b..21220f8e 100644
--- a/spec/suites/layer/LayerGroupSpec.js
+++ b/spec/suites/layer/LayerGroupSpec.js
@@ -1,4 +1,13 @@
 describe('LayerGroup', function () {
+	describe("#hasLayer", function () {
+		it("returns false when passed undefined, null, or false", function () {
+			var lg = L.layerGroup();
+			expect(lg.hasLayer(undefined)).to.equal(false);
+			expect(lg.hasLayer(null)).to.equal(false);
+			expect(lg.hasLayer(false)).to.equal(false);
+		});
+	});
+
 	describe("#addLayer", function () {
 		it('adds a layer', function () {
 			var lg = L.layerGroup(),
@@ -9,6 +18,7 @@
 			expect(lg.hasLayer(marker)).to.be(true);
 		});
 	});
+
 	describe("#removeLayer", function () {
 		it('removes a layer', function () {
 			var lg = L.layerGroup(),
@@ -20,6 +30,7 @@
 			expect(lg.hasLayer(marker)).to.be(false);
 		});
 	});
+
 	describe("#clearLayers", function () {
 		it('removes all layers', function () {
 			var lg = L.layerGroup(),
@@ -31,6 +42,7 @@
 			expect(lg.hasLayer(marker)).to.be(false);
 		});
 	});
+
 	describe("#getLayers", function () {
 		it('gets all layers', function () {
 			var lg = L.layerGroup(),
@@ -41,6 +53,7 @@
 			expect(lg.getLayers()).to.eql([marker]);
 		});
 	});
+
 	describe("#eachLayer", function () {
 		it('iterates over all layers', function () {
 			var lg = L.layerGroup(),
diff --git a/spec/suites/map/MapSpec.js b/spec/suites/map/MapSpec.js
index 064f1f0e..6d846f09 100644
--- a/spec/suites/map/MapSpec.js
+++ b/spec/suites/map/MapSpec.js
@@ -199,6 +199,15 @@ describe("Map", function () {
 		});
 	});
 
+	describe("#hasLayer", function () {
+		it("returns false when passed undefined, null, or false", function () {
+			var map = L.map(document.createElement('div'));
+			expect(map.hasLayer(undefined)).to.equal(false);
+			expect(map.hasLayer(null)).to.equal(false);
+			expect(map.hasLayer(false)).to.equal(false);
+		});
+	});
+
 	function layerSpy() {
 		var layer = new L.Layer();
 		layer.onAdd = sinon.spy();