diff --git a/src/main/java/org/springframework/samples/petclinic/system/CacheConfiguration.java b/src/main/java/org/springframework/samples/petclinic/system/CacheConfiguration.java
index 9d4a53c6..ea86dc36 100755
--- a/src/main/java/org/springframework/samples/petclinic/system/CacheConfiguration.java
+++ b/src/main/java/org/springframework/samples/petclinic/system/CacheConfiguration.java
@@ -33,9 +33,7 @@ class CacheConfiguration {
 
     @Bean
     public JCacheManagerCustomizer petclinicCacheConfigurationCustomizer() {
-        return cm -> {
-            cm.createCache("vets", cacheConfiguration());
-        };
+        return cm -> cm.createCache("vets", cacheConfiguration());
     }
 
     /**
diff --git a/src/main/resources/application-mysql.properties b/src/main/resources/application-mysql.properties
index 823b32b6..1125dea5 100644
--- a/src/main/resources/application-mysql.properties
+++ b/src/main/resources/application-mysql.properties
@@ -2,6 +2,6 @@
 database=mysql
 spring.datasource.url=jdbc:mysql://localhost/petclinic
 spring.datasource.username=root
-spring.datasource.password=petclinic
+spring.datasource.password=${DB_PASSWORD}
 # Uncomment this the first time the app runs
 # spring.datasource.initialization-mode=always
diff --git a/src/main/resources/templates/error.html b/src/main/resources/templates/error.html
index b9026690..1fbf8b3b 100644
--- a/src/main/resources/templates/error.html
+++ b/src/main/resources/templates/error.html
@@ -3,9 +3,9 @@
 <html xmlns:th="https://www.thymeleaf.org" th:replace="~{fragments/layout :: layout (~{::body},'error')}">
 
   <body>
-    <img src="../static/resources/images/pets.png" th:src="@{/resources/images/pets.png}"/>
+    <img src="../static/resources/images/pets.png" th:src="@{/resources/images/pets.png}" alt="Pets"/>
     <h2>Something happened...</h2>
     <p th:text="${message}">Exception message</p>
   </body>
 
-</html>
\ No newline at end of file
+</html>
diff --git a/src/test/java/org/springframework/samples/petclinic/owner/PetControllerTests.java b/src/test/java/org/springframework/samples/petclinic/owner/PetControllerTests.java
index 2ffae302..fea64bce 100755
--- a/src/test/java/org/springframework/samples/petclinic/owner/PetControllerTests.java
+++ b/src/test/java/org/springframework/samples/petclinic/owner/PetControllerTests.java
@@ -55,6 +55,7 @@
 public class PetControllerTests {
 
     private static final int TEST_OWNER_ID = 1;
+    private static final String PETS_NEW_URL = "/owners/{ownerId}/pets/new";
     private static final int TEST_PET_ID = 1;
 
 
@@ -80,7 +81,7 @@ public void setup() {
 
     @Test
     public void testInitCreationForm() throws Exception {
-        mockMvc.perform(get("/owners/{ownerId}/pets/new", TEST_OWNER_ID))
+        mockMvc.perform(get(PETS_NEW_URL, TEST_OWNER_ID))
             .andExpect(status().isOk())
             .andExpect(view().name("pets/createOrUpdatePetForm"))
             .andExpect(model().attributeExists("pet"));
@@ -88,7 +89,7 @@ public void testInitCreationForm() throws Exception {
 
     @Test
     public void testProcessCreationFormSuccess() throws Exception {
-        mockMvc.perform(post("/owners/{ownerId}/pets/new", TEST_OWNER_ID)
+        mockMvc.perform(post(PETS_NEW_URL, TEST_OWNER_ID)
             .param("name", "Betty")
             .param("type", "hamster")
             .param("birthDate", "2015-02-12")
