diff --git a/spring-boot-project/spring-boot-tools/spring-boot-loader-tools/src/main/resources/org/springframework/boot/loader/tools/launch.script b/spring-boot-project/spring-boot-tools/spring-boot-loader-tools/src/main/resources/org/springframework/boot/loader/tools/launch.script
index c409a4fd889..ce3115c4371 100755
--- a/spring-boot-project/spring-boot-tools/spring-boot-loader-tools/src/main/resources/org/springframework/boot/loader/tools/launch.script
+++ b/spring-boot-project/spring-boot-tools/spring-boot-loader-tools/src/main/resources/org/springframework/boot/loader/tools/launch.script
@@ -128,6 +128,9 @@ log_file="$LOG_FOLDER/$LOG_FILENAME"
 # shellcheck disable=SC2012
 [[ $(id -u) == "0" ]] && run_user=$(ls -ld "$jarfile" | awk '{print $3}')
 
+# Ensure the user actually exists
+id -u "$run_user" &> /dev/null || unset run_user
+
 # Run as user specified in RUN_AS_USER
 if [[ -n "$RUN_AS_USER" ]]; then
     if ! [[ "$action" =~ ^(status|run)$ ]]; then
diff --git a/spring-boot-tests/spring-boot-integration-tests/spring-boot-launch-script-tests/src/intTest/java/org/springframework/boot/launchscript/AbstractLaunchScriptIntegrationTests.java b/spring-boot-tests/spring-boot-integration-tests/spring-boot-launch-script-tests/src/intTest/java/org/springframework/boot/launchscript/AbstractLaunchScriptIntegrationTests.java
index eee11367474..3aa58c22a68 100644
--- a/spring-boot-tests/spring-boot-integration-tests/spring-boot-launch-script-tests/src/intTest/java/org/springframework/boot/launchscript/AbstractLaunchScriptIntegrationTests.java
+++ b/spring-boot-tests/spring-boot-integration-tests/spring-boot-launch-script-tests/src/intTest/java/org/springframework/boot/launchscript/AbstractLaunchScriptIntegrationTests.java
@@ -23,7 +23,9 @@ import java.util.List;
 import java.util.function.Predicate;
 
 import org.assertj.core.api.Condition;
+import org.slf4j.LoggerFactory;
 import org.testcontainers.containers.GenericContainer;
+import org.testcontainers.containers.output.Slf4jLogConsumer;
 import org.testcontainers.containers.output.ToStringConsumer;
 import org.testcontainers.containers.startupcheck.OneShotStartupCheckStrategy;
 import org.testcontainers.images.builder.ImageFromDockerfile;
@@ -85,6 +87,7 @@ abstract class AbstractLaunchScriptIntegrationTests {
 		try (LaunchScriptTestContainer container = new LaunchScriptTestContainer(os, version, this.scriptsDir,
 				script)) {
 			container.withLogConsumer(consumer);
+			container.withLogConsumer(new Slf4jLogConsumer(LoggerFactory.getLogger("docker")));
 			container.start();
 			while (container.isRunning()) {
 				Thread.sleep(100);
diff --git a/src/checkstyle/checkstyle-suppressions.xml b/src/checkstyle/checkstyle-suppressions.xml
index f44bc4d9b21..37f25362031 100644
--- a/src/checkstyle/checkstyle-suppressions.xml
+++ b/src/checkstyle/checkstyle-suppressions.xml
@@ -58,4 +58,5 @@
 	<suppress files="DeprecatedElasticsearchRestClientProperties\.java" checks="SpringMethodVisibility" />
 	<suppress files="DeprecatedReactiveElasticsearchRestClientProperties\.java" checks="SpringMethodVisibility" />
 	<suppress files="DevToolsR2dbcAutoConfigurationTests" checks="HideUtilityClassConstructor" />
+	<suppress files="AbstractLaunchScriptIntegrationTests" checks="IllegalImport" />
 </suppressions>