diff --git a/tests/plugins/plugin-animation.test.js b/tests/plugins/plugin-animation.test.js
index 3b417c5e..147ceb50 100644
--- a/tests/plugins/plugin-animation.test.js
+++ b/tests/plugins/plugin-animation.test.js
@@ -25,8 +25,7 @@ describe('animation plugin', function(){
 		}
 
 		jsPsych.init({
-			timeline: [trial],
-			auto_preload: false
+			timeline: [trial]
 		});
 
 		expect(jsPsych.getDisplayElement().innerHTML).toMatch('<img src="img/face_1.jpg" id="jspsych-animation-image"></img>');
diff --git a/tests/plugins/plugin-categorize-animation.test.js b/tests/plugins/plugin-categorize-animation.test.js
index 633d2776..fd261c11 100644
--- a/tests/plugins/plugin-categorize-animation.test.js
+++ b/tests/plugins/plugin-categorize-animation.test.js
@@ -23,8 +23,7 @@ describe('categorize-animation plugin', function(){
 		}
 
 		jsPsych.init({
-			timeline: [trial],
-			auto_preload: false
+			timeline: [trial]
 		});
 
 		jest.runTimersToTime(500);
@@ -43,8 +42,7 @@ describe('categorize-animation plugin', function(){
 		}
 
 		jsPsych.init({
-			timeline: [trial],
-			auto_preload: false
+			timeline: [trial]
 		});
 
 		jest.runTimersToTime(1500);
@@ -62,8 +60,7 @@ describe('categorize-animation plugin', function(){
 		}
 
 		jsPsych.init({
-			timeline: [trial],
-			auto_preload: false
+			timeline: [trial]
 		});
 
 		jest.runTimersToTime(1500);
@@ -83,8 +80,7 @@ describe('categorize-animation plugin', function(){
 		}
 
 		jsPsych.init({
-			timeline: [trial],
-			auto_preload: false
+			timeline: [trial]
 		});
 
 		jest.runTimersToTime(1500);
@@ -107,8 +103,7 @@ describe('categorize-animation plugin', function(){
   		};
 
   		jsPsych.init({
-    			timeline: [trials],
-					auto_preload: false
+    		timeline: [trials]
   		});
 
 		jest.runTimersToTime(1500);
@@ -130,8 +125,7 @@ describe('categorize-animation plugin', function(){
   		};
 
   		jsPsych.init({
-    			timeline: [trials],
-					auto_preload: false
+    		timeline: [trials]
   		});
 
 		jest.runTimersToTime(1500);
@@ -153,8 +147,7 @@ describe('categorize-animation plugin', function(){
   		};
 
   		jsPsych.init({
-    			timeline: [trials],
-					auto_preload: false
+    		timeline: [trials]
   		});
 
 		jest.runTimersToTime(1500);
@@ -177,8 +170,7 @@ describe('categorize-animation plugin', function(){
   		};
 
   		jsPsych.init({
-    		timeline: [trials],
-				auto_preload: false
+    		timeline: [trials]
   		});
 
 		jest.runTimersToTime(1000);
@@ -204,8 +196,7 @@ describe('categorize-animation plugin', function(){
   		};
 
   		jsPsych.init({
-    		timeline: [trials],
-				auto_preload: false
+    		timeline: [trials]
   		});
 
 		jest.runTimersToTime(1000);
@@ -234,8 +225,7 @@ describe('categorize-animation plugin', function(){
   		};
 
   		jsPsych.init({
-    		timeline: [trials],
-				auto_preload: false
+    		timeline: [trials]
   		});
 
 		jest.runTimersToTime(1500);
@@ -259,8 +249,7 @@ describe('categorize-animation plugin', function(){
   		};
 
   		jsPsych.init({
-    		timeline: [trials],
-				auto_preload: false
+    		timeline: [trials]
   		});
 
 		jest.runTimersToTime(1500);
diff --git a/tests/plugins/plugin-free-sort.test.js b/tests/plugins/plugin-free-sort.test.js
index a8294cc1..922218d7 100644
--- a/tests/plugins/plugin-free-sort.test.js
+++ b/tests/plugins/plugin-free-sort.test.js
@@ -20,8 +20,7 @@ describe('free-sort plugin', function(){
 		}
 
 		jsPsych.init({
-			timeline: [trial],
-			auto_preload: false
+			timeline: [trial]
 		});
 
 		expect(jsPsych.getDisplayElement().innerHTML).toMatch(new RegExp('src=\"img/happy_face_1.jpg\" data-src=\"img/happy_face_1.jpg\"'));
@@ -39,8 +38,7 @@ describe('free-sort plugin', function(){
 		}
 
 		jsPsych.init({
-			timeline: [trial],
-			auto_preload: false
+			timeline: [trial]
 		});
 
 		expect(jsPsych.getDisplayElement().innerHTML).toMatch(new RegExp('class=\"jspsych-free-sort-arena\" style=\"position: relative; width:700px; height:500px;'));
@@ -55,8 +53,7 @@ describe('free-sort plugin', function(){
 		}
 
 		jsPsych.init({
-			timeline: [trial],
-			auto_preload: false
+			timeline: [trial]
 		});
 
 		expect(jsPsych.getDisplayElement().innerHTML).toMatch(new RegExp('<img src=\"img/happy_face_1.jpg\".+width:200px; height:200px'));
@@ -70,8 +67,7 @@ describe('free-sort plugin', function(){
 		}
 
 		jsPsych.init({
-			timeline: [trial],
-			auto_preload: false
+			timeline: [trial]
 		});
 
 		expect(jsPsych.getDisplayElement().innerHTML).toMatch(new RegExp('<p>This is a prompt</p>'));
@@ -86,8 +82,7 @@ describe('free-sort plugin', function(){
 		}
 
 		jsPsych.init({
-			timeline: [trial],
-			auto_preload: false
+			timeline: [trial]
 		});
 
 		expect(jsPsych.getDisplayElement().innerHTML).toMatch(new RegExp('<p>This is a prompt</p>.+<button id=\"jspsych-free-sort-done-btn\"'));
@@ -102,8 +97,7 @@ describe('free-sort plugin', function(){
 		}
 
 		jsPsych.init({
-			timeline: [trial],
-			auto_preload: false
+			timeline: [trial]
 		});
 
 		expect(jsPsych.getDisplayElement().innerHTML).toMatch(new RegExp('<button id=\"jspsych-free-sort-done-btn\" class=\"jspsych-btn\".+>Finito</button>'));
diff --git a/tests/plugins/plugin-iat-image.test.js b/tests/plugins/plugin-iat-image.test.js
index bf02ff82..deab8091 100644
--- a/tests/plugins/plugin-iat-image.test.js
+++ b/tests/plugins/plugin-iat-image.test.js
@@ -29,8 +29,7 @@ describe('iat-image plugin', function(){
     }
 
     jsPsych.init({
-      timeline: [trial],
-			auto_preload: false
+      timeline: [trial]
     });
 
     expect(jsPsych.getDisplayElement().innerHTML).toMatch(/blue.png/);
@@ -51,8 +50,7 @@ describe('iat-image plugin', function(){
     }
 
     jsPsych.init({
-      timeline: [trial],
-			auto_preload: false
+      timeline: [trial]
     });
 
     utils.pressKey('j');
@@ -73,8 +71,7 @@ describe('iat-image plugin', function(){
     }
 
     jsPsych.init({
-      timeline: [trial],
-			auto_preload: false
+      timeline: [trial]
     });
 
     utils.pressKey('f');
@@ -98,8 +95,7 @@ describe('iat-image plugin', function(){
     }
 
     jsPsych.init({
-      timeline: [trial],
-			auto_preload: false
+      timeline: [trial]
     });
 
     utils.pressKey('f');
@@ -123,8 +119,7 @@ describe('iat-image plugin', function(){
     }
 
     jsPsych.init({
-      timeline: [trial],
-			auto_preload: false
+      timeline: [trial]
     });
 
     utils.pressKey('j');
@@ -148,8 +143,7 @@ describe('iat-image plugin', function(){
     }
 
     jsPsych.init({
-      timeline: [trial],
-			auto_preload: false
+      timeline: [trial]
     });
 
     expect(jsPsych.getDisplayElement().innerHTML).toMatch(new RegExp('<p>Press j for:<br> <b>UNFRIENDLY</b>'));
@@ -176,8 +170,7 @@ describe('iat-image plugin', function(){
     }
 
     jsPsych.init({
-      timeline: [trial],
-			auto_preload: false
+      timeline: [trial]
     });
 
     expect(jsPsych.getDisplayElement().querySelector('#wrongImgContainer').style.visibility).toBe('hidden');
@@ -200,8 +193,7 @@ describe('iat-image plugin', function(){
     }
 
     jsPsych.init({
-      timeline: [trial],
-			auto_preload: false
+      timeline: [trial]
     });
 
     expect(jsPsych.getDisplayElement().innerHTML).toMatch(new RegExp('<img src=\"../media/blue.png\" id=\"jspsych-iat-stim\">'));
@@ -227,8 +219,7 @@ describe('iat-image plugin', function(){
     }
 
     jsPsych.init({
-      timeline: [trial],
-      auto_preload: false
+      timeline: [trial]
     });
 
     utils.pressKey('f');
@@ -254,8 +245,7 @@ describe('iat-image plugin', function(){
     }
 
     jsPsych.init({
-      timeline: [trial],
-      auto_preload: false
+      timeline: [trial]
     });
 
     expect(jsPsych.getDisplayElement().innerHTML).toMatch(new RegExp('<img src="../media/blue.png" id=\"jspsych-iat-stim\">'));
@@ -288,8 +278,7 @@ describe('iat-image plugin', function(){
     }
 
     jsPsych.init({
-      timeline: [trial],
-      auto_preload: false
+      timeline: [trial]
     });
 
     expect(jsPsych.getDisplayElement().innerHTML).toMatch(new RegExp('<img src="../media/blue.png" id=\"jspsych-iat-stim\">'));
diff --git a/tests/plugins/plugin-image-button-response.test.js b/tests/plugins/plugin-image-button-response.test.js
index 3efa3dab..d2212212 100644
--- a/tests/plugins/plugin-image-button-response.test.js
+++ b/tests/plugins/plugin-image-button-response.test.js
@@ -23,8 +23,7 @@ describe('image-button-response', function(){
 		}
 
 		jsPsych.init({
-			timeline: [trial],
-			auto_preload: false
+			timeline: [trial]
 		});
 
 		expect(jsPsych.getDisplayElement().innerHTML).toMatch('<img src="../media/blue.png"');
@@ -39,8 +38,7 @@ describe('image-button-response', function(){
 		}
 
 		jsPsych.init({
-			timeline: [trial],
-			auto_preload: false
+			timeline: [trial]
 		});
 
 		expect(jsPsych.getDisplayElement().innerHTML).toMatch(new RegExp('<button class=\"jspsych-btn\">button-choice1</button>'));
@@ -57,8 +55,7 @@ describe('image-button-response', function(){
 		}
 
 		jsPsych.init({
-			timeline: [trial],
-			auto_preload: false
+			timeline: [trial]
 		});
 
 		expect(jsPsych.getDisplayElement().innerHTML).toMatch(new RegExp('<button class="jspsych-custom-button">buttonChoice</button>'));
@@ -73,8 +70,7 @@ describe('image-button-response', function(){
 		}
 
 		jsPsych.init({
-			timeline: [trial],
-			auto_preload: false
+			timeline: [trial]
 		});
 
 		expect(jsPsych.getDisplayElement().innerHTML).toMatch('<img src="../media/blue.png" id="jspsych-image-button-response-stimulus"');
@@ -94,8 +90,7 @@ describe('image-button-response', function(){
 		}
 
 		jsPsych.init({
-			timeline: [trial],
-			auto_preload: false
+			timeline: [trial]
 		});
 
 		expect(jsPsych.getDisplayElement().innerHTML).toMatch('<button class=\"jspsych-btn\">button-choice</button></div></div><p>This is a prompt</p>');
@@ -111,8 +106,7 @@ describe('image-button-response', function(){
 		}
 
 		jsPsych.init({
-			timeline: [trial],
-			auto_preload: false
+			timeline: [trial]
 		});
 
 		expect(jsPsych.getDisplayElement().querySelector('#jspsych-image-button-response-stimulus').style.visibility).toMatch("");
@@ -130,8 +124,7 @@ describe('image-button-response', function(){
 		}
 
 		jsPsych.init({
-			timeline: [trial],
-			auto_preload: false
+			timeline: [trial]
 		});
 
 		expect(jsPsych.getDisplayElement().innerHTML).toMatch('<img src="../media/blue.png" id="jspsych-image-button-response-stimulus"');
@@ -149,8 +142,7 @@ describe('image-button-response', function(){
 		}
 
 		jsPsych.init({
-			timeline: [trial],
-			auto_preload: false
+			timeline: [trial]
 		});
 
 		expect(jsPsych.getDisplayElement().innerHTML).toMatch('<img src="../media/blue.png" id="jspsych-image-button-response-stimulus"');
@@ -173,8 +165,7 @@ describe('image-button-response', function(){
 		};
 
 		jsPsych.init({
-			timeline: [trial],
-			auto_preload: false
+			timeline: [trial]
 		});
 
 		expect(spy).toHaveBeenCalled();
diff --git a/tests/plugins/plugin-image-keyboard-response.test.js b/tests/plugins/plugin-image-keyboard-response.test.js
index a167c889..40b43409 100644
--- a/tests/plugins/plugin-image-keyboard-response.test.js
+++ b/tests/plugins/plugin-image-keyboard-response.test.js
@@ -22,8 +22,7 @@ describe('image-keyboard-response', function(){
 		}
 
 		jsPsych.init({
-			timeline: [trial],
-			auto_preload: false
+			timeline: [trial]
 		});
 
 		expect(jsPsych.getDisplayElement().innerHTML).toMatch('<img src=\"../media/blue.png\" id=\"jspsych-image-keyboard-response-stimulus\"');
@@ -40,8 +39,7 @@ describe('image-keyboard-response', function(){
 		}
 
 		jsPsych.init({
-			timeline: [trial],
-			auto_preload: false
+			timeline: [trial]
 		});
 
 		expect(jsPsych.getDisplayElement().innerHTML).toMatch('<img src="../media/blue.png" id="jspsych-image-keyboard-response-stimulus"');
@@ -61,8 +59,7 @@ describe('image-keyboard-response', function(){
 		}
 
 		jsPsych.init({
-			timeline: [trial],
-			auto_preload: false
+			timeline: [trial]
 		});
 
 		expect(jsPsych.getDisplayElement().innerHTML).toMatch('<div id="foo">this is a prompt</div>');
@@ -79,8 +76,7 @@ describe('image-keyboard-response', function(){
 		}
 
 		jsPsych.init({
-			timeline: [trial],
-			auto_preload: false
+			timeline: [trial]
 		});
 
 		expect(jsPsych.getDisplayElement().querySelector('#jspsych-image-keyboard-response-stimulus').style.visibility).toMatch("");
@@ -100,8 +96,7 @@ describe('image-keyboard-response', function(){
 		}
 
 		jsPsych.init({
-			timeline: [trial],
-			auto_preload: false
+			timeline: [trial]
 		});
 
 		expect(jsPsych.getDisplayElement().innerHTML).toMatch('<img src="../media/blue.png" id="jspsych-image-keyboard-response-stimulus"');
@@ -119,8 +114,7 @@ describe('image-keyboard-response', function(){
 		}
 
 		jsPsych.init({
-			timeline: [trial],
-			auto_preload: false
+			timeline: [trial]
 		});
 
 		expect(jsPsych.getDisplayElement().innerHTML).toMatch('<img src="../media/blue.png" id="jspsych-image-keyboard-response-stimulus"');
@@ -144,8 +138,7 @@ describe('image-keyboard-response', function(){
 		};
 
 		jsPsych.init({
-			timeline: [trial],
-			auto_preload: false
+			timeline: [trial]
 		});
 
 		expect(spy).toHaveBeenCalled();
diff --git a/tests/plugins/plugin-image-slider-response.test.js b/tests/plugins/plugin-image-slider-response.test.js
index ef743866..a54e40d4 100644
--- a/tests/plugins/plugin-image-slider-response.test.js
+++ b/tests/plugins/plugin-image-slider-response.test.js
@@ -29,8 +29,7 @@ describe('image-slider-response', function(){
 		}
 
 		jsPsych.init({
-			timeline: [trial],
-			auto_preload: false
+			timeline: [trial]
 		});
 	});
 
@@ -44,8 +43,7 @@ describe('image-slider-response', function(){
 		}
 
 		jsPsych.init({
-			timeline: [trial],
-			auto_preload: false
+			timeline: [trial]
 		});
 
 		expect(jsPsych.getDisplayElement().innerHTML).toMatch('<span style=\"text-align: center; font-size: 80%;\">left</span>');
@@ -64,8 +62,7 @@ describe('image-slider-response', function(){
 		}
 
 		jsPsych.init({
-			timeline: [trial],
-			auto_preload: false
+			timeline: [trial]
 		});
 
 		expect(jsPsych.getDisplayElement().innerHTML).toMatch('<button id=\"jspsych-image-slider-response-next\" class=\"jspsych-btn\">button</button>');
@@ -86,8 +83,7 @@ describe('image-slider-response', function(){
 		}
 
 		jsPsych.init({
-			timeline: [trial],
-			auto_preload: false
+			timeline: [trial]
 		});
 
 		expect(jsPsych.getDisplayElement().querySelector('#jspsych-image-slider-response-response').min).toBe('2');
@@ -108,8 +104,7 @@ describe('image-slider-response', function(){
 		}
 
 		jsPsych.init({
-			timeline: [trial],
-			auto_preload: false
+			timeline: [trial]
 		});
 
 		expect(jsPsych.getDisplayElement().innerHTML).toMatch('<p>This is a prompt</p>');
@@ -128,8 +123,7 @@ describe('image-slider-response', function(){
 		}
 
 		jsPsych.init({
-			timeline: [trial],
-			auto_preload: false
+			timeline: [trial]
 		});
 
 		expect(jsPsych.getDisplayElement().querySelector('#jspsych-image-slider-response-stimulus').style.visibility).toMatch("");
@@ -146,12 +140,10 @@ describe('image-slider-response', function(){
 			button_label: 'button',
 			trial_duration: 500,
 			render_on_canvas: false
-
 		}
 
 		jsPsych.init({
-			timeline: [trial],
-			auto_preload: false
+			timeline: [trial]
 		});
 
 		expect(jsPsych.getDisplayElement().innerHTML).toMatch('<div id="jspsych-image-slider-response-stimulus"><img src="../media/blue.png"');
@@ -170,8 +162,7 @@ describe('image-slider-response', function(){
 		}
 
 		jsPsych.init({
-			timeline: [trial],
-			auto_preload: false
+			timeline: [trial]
 		});
 
 		expect(jsPsych.getDisplayElement().innerHTML).toMatch('<div id="jspsych-image-slider-response-stimulus"><img src="../media/blue.png"');