diff --git a/src/event.js b/src/event.js
index 0780537..5528b2e 100644
--- a/src/event.js
+++ b/src/event.js
@@ -9,35 +9,11 @@
 export default function event(spec, my) {
 	my ||= {};
 
-	// DEPRECATED: use that.register() instead.
-	function that(callback) {
-		// eslint-disable-next-line no-console
-		console.warn(
-			"Using an event as a function is deprecated. Send register() to the event instead.",
-		);
-
-		return that.register(callback);
-	}
-
 	let bindings = [];
 
 	// #### Public API
 
-	/**
-	 * Binds callback to event. The callback will be invoked whenever the event is fired.
-	 *
-	 * @deprecated use that.register() instead.
-	 * @param callback {function}
-	 * @returns {eventBinding}
-	 */
-	that.on = function (callback) {
-		// eslint-disable-next-line no-console
-		console.warn(
-			"Sending on() to an event is deprecated. Send register() instead.",
-		);
-
-		return that.register(callback);
-	};
+	let that = {};
 
 	/**
 	 * Binds callback to event. The callback will be invoked
@@ -121,22 +97,6 @@ export default function event(spec, my) {
 		return that;
 	}
 
-	/**
-	 * Like on() except callback will only be fired once
-	 *
-	 * @deprecated use registerOnce() instead
-	 * @param callback {function}
-	 * @returns {eventBinding}
-	 */
-	that.onceOn = function (callback) {
-		// eslint-disable-next-line no-console
-		console.warn(
-			"Sending onceOn() to an event is deprecated. Send registerOnce() instead.",
-		);
-
-		return that.registerOnce(callback);
-	};
-
 	/**
 	 * Like on() except callback will only be fired once
 	 *
@@ -155,21 +115,6 @@ export default function event(spec, my) {
 		return onceBinding;
 	};
 
-	/**
-	 * Removed "binding" attached to event.
-	 * @deprecated use unregister() instead
-	 * @param name {String} Name of event
-	 * @param binding {eventBinding} Binding
-	 */
-	that.off = function (binding) {
-		// eslint-disable-next-line no-console
-		console.warn(
-			"Sending off() to an event is deprecated. Send unregister() instead.",
-		);
-
-		that.unregister(binding);
-	};
-
 	/**
 	 * Removed "binding" attached to event.
 	 * @param name {String} Name of event
diff --git a/src/eventCategory.js b/src/eventCategory.js
index f15b4a5..29991f6 100644
--- a/src/eventCategory.js
+++ b/src/eventCategory.js
@@ -33,22 +33,6 @@ export default function eventCategory() {
 		return addEvent(event(), name);
 	};
 
-	/**
-	 * Binds callback to a named event. The callback will be invoked whenever the event is fired.
-	 *
-	 * @deprecated use register() instead
-	 * @param name {String}
-	 * @param callback {function}
-	 */
-	that.on = function (name, callback) {
-		// eslint-disable-next-line no-console
-		console.warn(
-			"Sending on() to a category is deprecated. Send register() instead.",
-		);
-
-		return that.register(name, callback);
-	};
-
 	/**
 	 * Binds callback to a named event. The callback will be invoked whenever the event is fired.
 	 *
@@ -59,21 +43,6 @@ export default function eventCategory() {
 		return ensureEventHolderFor(name).register(callback);
 	};
 
-	/**
-	 * Removed "binding" attached to event.
-	 * @deprecated use unregister() instead
-	 * @param name {String} Name of event
-	 * @param binding {eventBinding} Binding
-	 */
-	that.off = function (name, binding) {
-		// eslint-disable-next-line no-console
-		console.warn(
-			"Sending off() to a category is deprecated. Send unregister() instead.",
-		);
-
-		return that.unregister(name, binding);
-	};
-
 	/**
 	 * Removed "binding" attached to event.
 	 * @param name {String} Name of event
@@ -83,23 +52,6 @@ export default function eventCategory() {
 		return ensureEventHolderFor(name).unregister(binding);
 	};
 
-	/**
-	 * Like on() except callback will only be fired once
-	 *
-	 * @deprecated use registerOnce() instead
-	 * @param name
-	 * @param callback
-	 * @returns {*}
-	 */
-	that.onceOn = function (name, callback) {
-		// eslint-disable-next-line no-console
-		console.warn(
-			"Sending onceOn() to a category is deprecated. Send registerOnce() instead.",
-		);
-
-		return that.registerOnce(name, callback);
-	};
-
 	/**
 	 * Like on() except callback will only be fired once
 	 *
diff --git a/test/events.test.js b/test/events.test.js
index cb52187..37ca1bb 100644
--- a/test/events.test.js
+++ b/test/events.test.js
@@ -158,8 +158,8 @@ describe("events", () => {
 		let anotherEvent = someEvents.createEvent();
 
 		// Assert: events created
-		expect(anEvent.on).toBeTruthy();
-		expect(anotherEvent.on).toBeTruthy();
+		expect(anEvent.register).toBeTruthy();
+		expect(anotherEvent.register).toBeTruthy();
 	});
 
 	it("Event Category can keep named events", () => {
@@ -168,7 +168,7 @@ describe("events", () => {
 		let anEvent = someEvents.createEvent("namedEvent");
 
 		// Assert: events created
-		expect(anEvent.on).toBeTruthy();
+		expect(anEvent.register).toBeTruthy();
 	});
 
 	it("Event Category can bind callback to named event using register", () => {
@@ -261,107 +261,3 @@ describe("events", () => {
 		expect(triggered).toBeTruthy();
 	});
 });
-
-describe("deprecated", () => {
-	/* eslint-disable no-console */
-	let originalConsoleWarn;
-
-	beforeEach(() => {
-		console.warn = jasmine.createSpy("console.warn");
-	});
-
-	beforeAll(() => {
-		originalConsoleWarn = console.warn;
-	});
-
-	afterAll(() => {
-		console.warn = originalConsoleWarn;
-	});
-
-	it("on() method delegates to register", () => {
-		// Arrange: an event
-		let anEvent = event();
-		let spy = jasmine.createSpy("register");
-
-		anEvent.register = spy;
-		anEvent.on("foo");
-
-		expect(spy).toHaveBeenCalledWith("foo");
-		expect(console.warn).toHaveBeenCalled();
-	});
-
-	it("'using an event as a function' delegates to register", () => {
-		// Arrange: an event
-		let anEvent = event();
-		let spy = jasmine.createSpy("register");
-
-		anEvent.register = spy;
-		anEvent("foo");
-
-		expect(spy).toHaveBeenCalledWith("foo");
-		expect(console.warn).toHaveBeenCalled();
-	});
-
-	it("off() method delegates to unregister", () => {
-		// Arrange: an event
-		let anEvent = event();
-		let spy = jasmine.createSpy("unregister");
-
-		anEvent.unregister = spy;
-		anEvent.off("foo");
-
-		expect(spy).toHaveBeenCalledWith("foo");
-		expect(console.warn).toHaveBeenCalled();
-	});
-
-	it("onceOn() method delegates to registerOnce", () => {
-		// Arrange: an event
-		let anEvent = event();
-		let spy = jasmine.createSpy("registerOnce");
-
-		anEvent.registerOnce = spy;
-		anEvent.onceOn(spy);
-
-		expect(spy).toHaveBeenCalled();
-		expect(console.warn).toHaveBeenCalled();
-	});
-
-	it("on() category method delegates to register", () => {
-		// Arrange: an event
-		let someEvents = eventCategory();
-		let spy = jasmine.createSpy("register");
-
-		someEvents.register = spy;
-
-		someEvents.on("namedEvent", "something else");
-
-		expect(spy).toHaveBeenCalledWith("namedEvent", "something else");
-		expect(console.warn).toHaveBeenCalled();
-	});
-
-	it("off() category method delegates to unregister", () => {
-		// Arrange: an event
-		let someEvents = eventCategory();
-		let spy = jasmine.createSpy("unregister");
-
-		someEvents.unregister = spy;
-
-		someEvents.off("namedEvent", "something else");
-
-		expect(spy).toHaveBeenCalledWith("namedEvent", "something else");
-		expect(console.warn).toHaveBeenCalled();
-	});
-
-	it("onceOn() category method delegates to registerOnce", () => {
-		// Arrange: an event
-		let someEvents = eventCategory();
-		let spy = jasmine.createSpy("registerOnce");
-
-		someEvents.registerOnce = spy;
-
-		someEvents.onceOn("namedEvent", "something else");
-
-		expect(spy).toHaveBeenCalledWith("namedEvent", "something else");
-		expect(console.warn).toHaveBeenCalled();
-	});
-});