diff --git a/src/Pyramid-Bloc/PyramidPluginTestModeTest.class.st b/src/Pyramid-Bloc/PyramidPluginTestModeTest.class.st
new file mode 100644
index 00000000..640a965e
--- /dev/null
+++ b/src/Pyramid-Bloc/PyramidPluginTestModeTest.class.st
@@ -0,0 +1,81 @@
+Class {
+	#name : #PyramidPluginTestModeTest,
+	#superclass : #TestCase,
+	#instVars : [
+		'plugin',
+		'spacePlugin',
+		'editor'
+	],
+	#category : #'Pyramid-Bloc-plugin-testmode'
+}
+
+{ #category : #accessing }
+PyramidPluginTestModeTest >> editor [
+^ editor
+]
+
+{ #category : #accessing }
+PyramidPluginTestModeTest >> plugin [
+
+	^ plugin
+]
+
+{ #category : #running }
+PyramidPluginTestModeTest >> setUp [
+
+	super setUp.
+
+	plugin := PyramidPluginTestMode new.
+	spacePlugin := PyramidSpacePlugin new.
+	editor := PyramidEditorBuilder new plugins: { plugin . spacePlugin }; build.
+]
+
+{ #category : #tests }
+PyramidPluginTestModeTest >> testIsTestOnGoing [
+
+	self assert: self plugin isTestOnGoing not.
+	self plugin switchToTestMode.
+	self assert: self plugin isTestOnGoing.
+	self plugin switchToTestMode.
+	self assert: self plugin isTestOnGoing not.
+]
+
+{ #category : #tests }
+PyramidPluginTestModeTest >> testSwitchToTestMode [
+
+	| element elementThatReceiveEvent |
+	element := BlElement new
+		           size: 500 asPoint;
+		           background: Color blue;
+		           addEventHandler: (BlEventHandler
+				            on: BlPrimaryClickEvent
+				            do: [ :evt |  ]);
+		           yourself.
+	self plugin elementAtEvents addEventHandler: (BlEventHandler
+			 on: BlPrimaryClickEvent
+			 do: [ :evt |  ]).
+	self editor projectModel firstLevelElements add: element.
+
+	self plugin elementAtMain forceLayout.
+	elementThatReceiveEvent := self plugin elementAtMain
+		                           findMouseEventTargetAt:
+		                           10 asPoint
+		                           + self plugin currentTransformTranslation.
+	self deny: elementThatReceiveEvent equals: element.
+
+	self plugin switchToTestMode.
+	self plugin elementAtMain forceLayout.
+	elementThatReceiveEvent := self plugin elementAtMain
+		                           findMouseEventTargetAt:
+		                           10 asPoint
+		                           + self plugin currentTransformTranslation.
+	self assert: elementThatReceiveEvent equals: element.
+
+	self plugin switchToTestMode.
+	self plugin elementAtMain forceLayout.
+	elementThatReceiveEvent := self plugin elementAtMain
+		                           findMouseEventTargetAt:
+		                           10 asPoint
+		                           + self plugin currentTransformTranslation.
+	self deny: elementThatReceiveEvent equals: element
+]