diff --git a/backend/experiment/rules/categorization.py b/backend/experiment/rules/categorization.py
index 5097c0c39..1926ab9d5 100644
--- a/backend/experiment/rules/categorization.py
+++ b/backend/experiment/rules/categorization.py
@@ -12,6 +12,8 @@
 from .base import Base
 import random
 
+from django.conf import settings
+
 
 SCORE_AVG_MIN_TRAINING = 0.8
 
@@ -288,7 +290,7 @@ def plan_experiment(self, session):
             participant=session.participant)
 
         # Check if this participant already has a previous session
-        if current_sessions.count() > 1:
+        if current_sessions.count() > 1 and not settings.TESTING:
             json_data = 'REPEAT'
         else:
             # Check wether a group falls behind in the count
diff --git a/frontend/src/components/Question/Question.js b/frontend/src/components/Question/Question.js
index 0026b6d4e..ae48751bd 100644
--- a/frontend/src/components/Question/Question.js
+++ b/frontend/src/components/Question/Question.js
@@ -81,6 +81,10 @@ const Question = ({
             )}
             <h3 className={classNames({title: emphasizeTitle})}>{question.question}</h3>
             <div className="question">{render(question.view)}</div>
+            {question.expected_response &&
+                /* Will only be visible when the backend settings has TESTING=True */
+                <p className="expected-response">{question.expected_response}</p>
+            }
         </div>
     );
 };
diff --git a/frontend/src/components/Question/Question.scss b/frontend/src/components/Question/Question.scss
index 498b85083..7de512f97 100644
--- a/frontend/src/components/Question/Question.scss
+++ b/frontend/src/components/Question/Question.scss
@@ -42,3 +42,7 @@
 
     
 }
+
+.expected-response {
+    display:none;
+}
diff --git a/tests/tests-selenium.py b/tests/tests-selenium.py
index ee014df9a..5a0f45b49 100644
--- a/tests/tests-selenium.py
+++ b/tests/tests-selenium.py
@@ -74,6 +74,7 @@ def tearDown(self):
         self.driver.quit()
         #warnings.simplefilter("default", ResourceWarning)
 
+
     def test_beatalignment(self):
 
         self.driver.get("{}/{}".format(self.config['url']['root'], self.config['experiment_slugs']['beat_alignment']))
@@ -167,5 +168,62 @@ def test_eurovision(self):
         self.driver.find_element(By.XPATH,  '//*[text()="Play again"]')
 
 
+    def test_categorization(self):
+
+        self.driver.get("{}/{}".format(self.config['url']['root'], self.config['experiment_slugs']['categorization']))
+
+        # Explainer 1
+        self.driver.find_element(By.XPATH, "//div[text()=\"Ok\"]").click()
+
+        # If consent present, agree
+        if self.driver.find_element(By.TAG_NAME,"h4").text.lower() == "informed consent":
+            self.driver.find_element(By.XPATH, '//div[text()="I agree"]').click()
+
+        # What is your age?
+        el = WebDriverWait(self.driver, 3).until(presence_of_element_located((By.CSS_SELECTOR,"input[type='number']")))
+        el.send_keys(18)
+        self.driver.find_element(By.XPATH,  '//*[text()="Continue"]').click()
+
+        # What is your gender
+        self.driver.find_element(By.CSS_SELECTOR, ".radio:nth-child(1)").click()
+        self.driver.find_element(By.XPATH,  '//*[text()="Continue"]').click()
+
+        # What is your native language
+        select = Select(self.driver.find_element(By.TAG_NAME, 'select'))
+        select.select_by_value('nl')
+        self.driver.find_element(By.XPATH,  '//*[text()="Continue"]').click()
+
+        # Please select your level of musical experience
+        self.driver.find_element(By.CSS_SELECTOR, ".radio:nth-child(1)").click()
+        self.driver.find_element(By.XPATH,  '//*[text()="Continue"]').click()
+
+        # Explainer 2
+        WebDriverWait(self.driver, 5) \
+                .until(presence_of_element_located((By.XPATH, "//div[text()=\"Ok\"]"))) \
+                .click()
+
+        training_rounds = 20
+        testing_rounds = 80
+        training = True
+        for n in (training_rounds, testing_rounds):
+            for i in range(n):
+
+                WebDriverWait(self.driver, 5) \
+                    .until(presence_of_element_located((By.CSS_SELECTOR, ".aha__play-button"))) \
+                    .click()
+
+                expected_response = self.driver.execute_script('return document.querySelector(".expected-response").textContent')
+                button_to_click = self.driver.execute_script(f'return document.querySelector(\'input[value="{expected_response}"]\').parentElement')
+                WebDriverWait(self.driver, 5) \
+                    .until(lambda x: False if "disabled" in button_to_click.get_attribute("class") else button_to_click) \
+                    .click()
+
+            if training:
+                WebDriverWait(self.driver, 5) \
+                    .until(presence_of_element_located((By.XPATH, "//div[text()=\"Ok\"]"))) \
+                    .click()
+                training = False
+
+
 if __name__ == '__main__':
     unittest.main()