diff --git a/webapp/src/components/GeneratedQuestionsList.js b/webapp/src/components/GeneratedQuestionsList.js
index 9d0d6322..68ee5d0c 100644
--- a/webapp/src/components/GeneratedQuestionsList.js
+++ b/webapp/src/components/GeneratedQuestionsList.js
@@ -76,4 +76,8 @@ const GeneratedQuestionsList = ({setError}) => {
   );
 };
 
+GeneratedQuestionsList.propTypes = {
+  setError: PropTypes.func.isRequired,
+};
+
 export default GeneratedQuestionsList;
diff --git a/webapp/src/components/Login.test.js b/webapp/src/components/Login.test.js
index 6d789bf6..22213ee9 100644
--- a/webapp/src/components/Login.test.js
+++ b/webapp/src/components/Login.test.js
@@ -123,11 +123,9 @@ describe('Login Component', () => {
         fireEvent.click(usersListTab);
       });
 
-      await waitFor(() => {
-        tabTexts.forEach(async (tabText) => {
-          const elements = await screen.findAllByText(new RegExp(tabText, 'i'));
-          expect(elements.length).toBeGreaterThan(0);
-        });
+      await waitFor(async () => {
+        await Promise.all(tabTexts.map(tabText => screen.findAllByText(new RegExp(tabText, 'i'))))
+                      .then(elementsArray => elementsArray.forEach(elements => expect(elements.length).toBeGreaterThan(0)));
       });
     }
 
diff --git a/webapp/src/components/RankingList.js b/webapp/src/components/RankingList.js
index 299f5852..1db8d890 100644
--- a/webapp/src/components/RankingList.js
+++ b/webapp/src/components/RankingList.js
@@ -99,4 +99,9 @@ const RankingList = ({setError}) => {
   );
 };
 
+
+RankingList.propTypes = {
+  setError: PropTypes.func.isRequired,
+};
+
 export default RankingList;
diff --git a/webapp/src/components/RankingList.test.js b/webapp/src/components/RankingList.test.js
index e0260cfa..8c7e6b9a 100644
--- a/webapp/src/components/RankingList.test.js
+++ b/webapp/src/components/RankingList.test.js
@@ -292,31 +292,28 @@ describe('RankingList', () => {
 
   }); // fin tests correctos
 
-  describe('failing requests', () => {
-    test('should display an error message when the request fails', async () => {
-      let errorShown = "";
-        await act(async () => {
-          render(<RankingList setError={(errorMsg) => {errorShown=errorMsg}} />);
-        });
+  test('should display an error message when the request fails', async () => {
+    let errorShown = "";
+      await act(async () => {
+        render(<RankingList setError={(errorMsg) => {errorShown=errorMsg}} />);
+      });
 
-      // simulate a failed request
-      mockAxios.onPost('http://localhost:8000/obtainRank').reply(500, { error: 'Internal Server Error' });
+    // simulate a failed request
+    mockAxios.onPost('http://localhost:8000/obtainRank').reply(500, { error: 'Internal Server Error' });
 
-      // Check if the table headers are in the document 
-      expect(screen.queryByText("Ranking")).toBeInTheDocument();
-      expect(screen.getByText(/Nombre de Usuario/i)).toBeInTheDocument();
-      expect(screen.queryAllByText(/Porcentaje de Aciertos/i)).not.toHaveLength(0);
-      expect(screen.getByText(/Preguntas Correctas/i)).toBeInTheDocument();
-      expect(screen.getByText(/Preguntas Falladas/i)).toBeInTheDocument();
-      expect(screen.getByText(/Número de Partidas/i)).toBeInTheDocument();
+    // Check if the table headers are in the document 
+    expect(screen.queryByText("Ranking")).toBeInTheDocument();
+    expect(screen.getByText(/Nombre de Usuario/i)).toBeInTheDocument();
+    expect(screen.queryAllByText(/Porcentaje de Aciertos/i)).not.toHaveLength(0);
+    expect(screen.getByText(/Preguntas Correctas/i)).toBeInTheDocument();
+    expect(screen.getByText(/Preguntas Falladas/i)).toBeInTheDocument();
+    expect(screen.getByText(/Número de Partidas/i)).toBeInTheDocument();
 
-      // and no users rows are shown
-      const rows = await screen.findAllByRole('row');
-      expect(rows.length).toBe(1);
-
-      expect(errorShown).toBe("Error obteniendo el ranking del usuario: TypeError: Cannot read properties of undefined (reading 'status')");
-    });
+    // and no users rows are shown
+    const rows = await screen.findAllByRole('row');
+    expect(rows.length).toBe(1);
 
-  }); // fin tests fallidos
+    expect(errorShown).toBe("Error obteniendo el ranking del usuario: TypeError: Cannot read properties of undefined (reading 'status')");
+  });
 
 });
diff --git a/webapp/src/components/UsersList.js b/webapp/src/components/UsersList.js
index fac64076..446e04dc 100644
--- a/webapp/src/components/UsersList.js
+++ b/webapp/src/components/UsersList.js
@@ -80,4 +80,8 @@ const UsersList = ({ setError }) => {
   );
 };
 
+UsersList.propTypes = {
+  setError: PropTypes.func.isRequired,
+};
+
 export default UsersList;
\ No newline at end of file