diff --git a/integration-tests/maven/src/test/java/io/quarkus/maven/it/DevMojoIT.java b/integration-tests/maven/src/test/java/io/quarkus/maven/it/DevMojoIT.java
index 3cbe292a417fba..31fc995b2c600f 100644
--- a/integration-tests/maven/src/test/java/io/quarkus/maven/it/DevMojoIT.java
+++ b/integration-tests/maven/src/test/java/io/quarkus/maven/it/DevMojoIT.java
@@ -649,16 +649,15 @@ public void testThatTheApplicationIsReloadedMultiModule() throws MavenInvocation
 
         // Create a new resource
         source = new File(testDir, "html/src/main/resources/META-INF/resources/lorem.txt");
-        FileUtils.write(source,
-                "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.",
-                "UTF-8");
+        Files.writeString(source.toPath(),
+                "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.");
         await()
                 .pollDelay(100, TimeUnit.MILLISECONDS)
                 .atMost(TestUtils.getDefaultTimeout(), TimeUnit.MINUTES)
                 .until(() -> devModeClient.getHttpResponse("/lorem.txt").contains("Lorem ipsum"));
 
         // Update the resource
-        FileUtils.write(source, uuid, "UTF-8");
+        Files.writeString(source.toPath(), uuid);
         await()
                 .pollDelay(100, TimeUnit.MILLISECONDS)
                 .atMost(TestUtils.getDefaultTimeout(), TimeUnit.MINUTES)
@@ -755,7 +754,7 @@ public void testThatTheApplicationIsReloadedOnNewResource() throws MavenInvocati
                 "        return \"bar\";\n" +
                 "    }\n" +
                 "}\n";
-        FileUtils.write(source, myNewResource, StandardCharsets.UTF_8);
+        Files.writeString(source.toPath(), myNewResource);
 
         // Wait until we get "bar"
         await()
@@ -790,7 +789,7 @@ public void testThatClassFileAreCleanedUp() throws MavenInvocationException, IOE
                 "        return \"to be deleted\";\n" +
                 "    }\n" +
                 "}";
-        FileUtils.write(source, classDeletionResource, StandardCharsets.UTF_8);
+        Files.writeString(source.toPath(), classDeletionResource, StandardCharsets.UTF_8);
 
         runAndCheck();
         // Wait until source file is compiled
@@ -903,9 +902,8 @@ public void testThatAddingConfigFileWorksCorrectly() throws MavenInvocationExcep
 
         String uuid = UUID.randomUUID().toString();
 
-        FileUtils.write(configurationFile,
-                "greeting=" + uuid,
-                "UTF-8");
+        Files.writeString(configurationFile.toPath(),
+                "greeting=" + uuid);
         await()
                 .pollDelay(100, TimeUnit.MILLISECONDS)
                 .pollInterval(1, TimeUnit.SECONDS)
@@ -926,9 +924,8 @@ public void testThatExternalConfigOverridesConfigInJar() throws MavenInvocationE
 
         String uuid = UUID.randomUUID().toString();
 
-        FileUtils.write(configurationFile,
-                "greeting=" + uuid,
-                "UTF-8");
+        Files.writeString(configurationFile.toPath(),
+                "greeting=" + uuid);
         await()
                 .pollDelay(100, TimeUnit.MILLISECONDS)
                 .pollInterval(1, TimeUnit.SECONDS)
@@ -950,26 +947,25 @@ public void testThatNewResourcesAreServed() throws MavenInvocationException, IOE
 
         // Create a new resource
         File source = new File(testDir, "src/main/resources/META-INF/resources/lorem.txt");
-        FileUtils.write(source,
-                "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.",
-                "UTF-8");
+        Files.writeString(source.toPath(),
+                "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.");
         await()
-                .pollDelay(100, TimeUnit.MILLISECONDS)
+                .pollDelay(200, TimeUnit.MILLISECONDS)
                 .atMost(TestUtils.getDefaultTimeout(), TimeUnit.MINUTES)
                 .until(() -> devModeClient.getHttpResponse("/lorem.txt"), containsString("Lorem ipsum"));
 
         // Update the resource
         String uuid = UUID.randomUUID().toString();
-        FileUtils.write(source, uuid, "UTF-8");
+        Files.writeString(source.toPath(), uuid);
         await()
-                .pollDelay(100, TimeUnit.MILLISECONDS)
+                .pollDelay(200, TimeUnit.MILLISECONDS)
                 .atMost(TestUtils.getDefaultTimeout(), TimeUnit.MINUTES)
                 .until(() -> devModeClient.getHttpResponse("/lorem.txt"), equalTo(uuid));
 
         // Delete the resource
         source.delete();
         await()
-                .pollDelay(100, TimeUnit.MILLISECONDS)
+                .pollDelay(200, TimeUnit.MILLISECONDS)
                 .atMost(TestUtils.getDefaultTimeout(), TimeUnit.MINUTES)
                 .until(() -> devModeClient.getHttpResponse("/lorem.txt", 404));
     }
@@ -985,7 +981,7 @@ public void testThatConfigFileDeletionsAreDetected() throws MavenInvocationExcep
                 .until(() -> devModeClient.getHttpResponse("/app/hello/greetings").contains("Bonjour"));
 
         File source = new File(testDir, "src/main/resources/application.properties");
-        FileUtils.delete(source);
+        Files.delete(source.toPath());
 
         await()
                 .pollDelay(100, TimeUnit.MILLISECONDS)
@@ -1014,7 +1010,7 @@ private void testMultipleResourceDirectories() throws MavenInvocationException,
 
         // Update the application.properties
         File source = new File(testDir, "src/main/resources-primary/application.properties");
-        FileUtils.write(source, "greeting=Salut", "UTF-8");
+        Files.writeString(source.toPath(), "greeting=Salut");
         await()
                 .pollDelay(100, TimeUnit.MILLISECONDS)
                 .atMost(TestUtils.getDefaultTimeout(), TimeUnit.MINUTES)
@@ -1022,16 +1018,16 @@ private void testMultipleResourceDirectories() throws MavenInvocationException,
 
         // Add the application.yaml
         source = new File(testDir, "src/main/resources-secondary/application.yaml");
-        FileUtils.write(source, "other:\n" +
-                "  greeting: Buenos dias", "UTF-8");
+        Files.writeString(source.toPath(), "other:\n" +
+                "  greeting: Buenos dias");
         await()
                 .pollDelay(100, TimeUnit.MILLISECONDS)
                 .atMost(TestUtils.getDefaultTimeout(), TimeUnit.MINUTES)
                 .until(() -> devModeClient.getHttpResponse("/app/hello/greetings").contains("Salut/Buenos dias"));
 
         // Update the application.yaml
-        FileUtils.write(source, "other:\n" +
-                "  greeting: Hola", "UTF-8");
+        Files.writeString(source.toPath(), "other:\n" +
+                "  greeting: Hola");
         await()
                 .pollDelay(100, TimeUnit.MILLISECONDS)
                 .atMost(TestUtils.getDefaultTimeout(), TimeUnit.MINUTES)
@@ -1127,7 +1123,7 @@ public void testThatNewBeanAreDiscovered() throws IOException, MavenInvocationEx
                 "    }\n" +
                 "    \n" +
                 "}";
-        FileUtils.write(source, content, "UTF-8");
+        Files.writeString(source.toPath(), content);
 
         // Update the resource to use the bean
         File resource = new File(testDir, "src/main/java/org/acme/HelloResource.java");
@@ -1399,7 +1395,7 @@ public void testThatWatchedAbsolutePathsAreNotDeleted() throws MavenInvocationEx
 
         // Update the .env
         File source = new File(testDir, ".env");
-        FileUtils.write(source, "GREETING=Hallo", "UTF-8");
+        Files.writeString(source.toPath(), "GREETING=Hallo");
 
         assertTrue(source.exists());