diff --git a/javaagent-tooling/src/main/java/io/opentelemetry/javaagent/tooling/LoggingConfigurer.java b/javaagent-tooling/src/main/java/io/opentelemetry/javaagent/tooling/LoggingConfigurer.java
index 5c63b6f8ef..f629901ab2 100644
--- a/javaagent-tooling/src/main/java/io/opentelemetry/javaagent/tooling/LoggingConfigurer.java
+++ b/javaagent-tooling/src/main/java/io/opentelemetry/javaagent/tooling/LoggingConfigurer.java
@@ -27,15 +27,7 @@ final class LoggingConfigurer {
 
     if (isDebugMode()) {
       setSystemPropertyDefault(SIMPLE_LOGGER_DEFAULT_LOG_LEVEL_PROPERTY, "DEBUG");
-      // suppress a couple of verbose ClassNotFoundException stack traces logged at debug level
-      setSystemPropertyDefault(SIMPLE_LOGGER_PREFIX + "io.perfmark.PerfMark", "INFO");
-      setSystemPropertyDefault(SIMPLE_LOGGER_PREFIX + "io.grpc.Context", "INFO");
-      setSystemPropertyDefault(SIMPLE_LOGGER_PREFIX + "io.grpc.internal.ServerImplBuilder", "INFO");
-      setSystemPropertyDefault(SIMPLE_LOGGER_PREFIX + "io.grpc.ManagedChannelRegistry", "INFO");
-      setSystemPropertyDefault(
-          SIMPLE_LOGGER_PREFIX + "io.netty.util.internal.NativeLibraryLoader", "INFO");
-      setSystemPropertyDefault(
-          SIMPLE_LOGGER_PREFIX + "io.grpc.internal.ManagedChannelImplBuilder", "INFO");
+      setSystemPropertyDefault(SIMPLE_LOGGER_PREFIX + "okhttp3.internal.http2", "INFO");
     } else {
       // by default muzzle warnings are turned off
       setSystemPropertyDefault(SIMPLE_LOGGER_PREFIX + "muzzleMatcher", "OFF");
diff --git a/smoke-tests/src/test/java/io/opentelemetry/smoketest/LinuxTestContainerManager.java b/smoke-tests/src/test/java/io/opentelemetry/smoketest/LinuxTestContainerManager.java
index fe70c467e3..9ef4cc4ec0 100644
--- a/smoke-tests/src/test/java/io/opentelemetry/smoketest/LinuxTestContainerManager.java
+++ b/smoke-tests/src/test/java/io/opentelemetry/smoketest/LinuxTestContainerManager.java
@@ -21,8 +21,8 @@ import org.testcontainers.utility.DockerImageName;
 import org.testcontainers.utility.MountableFile;
 
 public class LinuxTestContainerManager extends AbstractTestContainerManager {
-  private static final Logger logger = LoggerFactory.getLogger(LinuxTestContainerManager.class);
   private static final Logger backendLogger = LoggerFactory.getLogger("Backend");
+  private static final Logger appLogger = LoggerFactory.getLogger("App");
 
   private final Network network = Network.newNetwork();
   private GenericContainer<?> backend = null;
@@ -79,7 +79,7 @@ public class LinuxTestContainerManager extends AbstractTestContainerManager {
             .withExposedPorts(TARGET_PORT)
             .withNetwork(network)
             .withLogConsumer(output)
-            .withLogConsumer(new Slf4jLogConsumer(logger))
+            .withLogConsumer(new Slf4jLogConsumer(appLogger))
             .withCopyFileToContainer(
                 MountableFile.forHostPath(agentPath), "/" + TARGET_AGENT_FILENAME)
             .withEnv(getAgentEnvironment(jvmArgsEnvVarName))
diff --git a/smoke-tests/src/test/java/io/opentelemetry/smoketest/windows/WindowsTestContainerManager.java b/smoke-tests/src/test/java/io/opentelemetry/smoketest/windows/WindowsTestContainerManager.java
index 627b73f752..20e3711c59 100644
--- a/smoke-tests/src/test/java/io/opentelemetry/smoketest/windows/WindowsTestContainerManager.java
+++ b/smoke-tests/src/test/java/io/opentelemetry/smoketest/windows/WindowsTestContainerManager.java
@@ -53,6 +53,7 @@ import org.testcontainers.containers.output.OutputFrame;
 public class WindowsTestContainerManager extends AbstractTestContainerManager {
   private static final Logger logger = LoggerFactory.getLogger(WindowsTestContainerManager.class);
   private static final Logger backendLogger = LoggerFactory.getLogger("Backend");
+  private static final Logger appLogger = LoggerFactory.getLogger("App");
 
   private static final String NPIPE_URI = "npipe:////./pipe/docker_engine";
 
@@ -179,7 +180,7 @@ public class WindowsTestContainerManager extends AbstractTestContainerManager {
             },
             createTargetWaiter(waitStrategy),
             /* inspect= */ true,
-            logger);
+            appLogger);
     return null;
   }
 
diff --git a/smoke-tests/src/test/resources/logback-test.xml b/smoke-tests/src/test/resources/logback-test.xml
new file mode 100644
index 0000000000..55a193c3f3
--- /dev/null
+++ b/smoke-tests/src/test/resources/logback-test.xml
@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+
+  <appender name="console" class="ch.qos.logback.core.ConsoleAppender">
+    <encoder>
+      <pattern>
+        %d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
+      </pattern>
+    </encoder>
+  </appender>
+  <appender name="backend" class="ch.qos.logback.core.ConsoleAppender">
+    <encoder>
+      <pattern>
+        %logger{36} - %msg%n
+      </pattern>
+    </encoder>
+  </appender>
+
+  <root level="INFO">
+    <appender-ref ref="console"/>
+  </root>
+
+  <logger name="org.testcontainers" level="WARN" />
+  <logger name="io.opentelemetry.testing.internal.armeria" level="WARN"/>
+
+  <logger name="Backend" level="debug" additivity="false">
+    <appender-ref ref="backend" />
+  </logger>
+
+  <logger name="App" level="debug" additivity="false">
+    <appender-ref ref="backend" />
+  </logger>
+
+</configuration>
diff --git a/smoke-tests/src/test/resources/logback.xml b/smoke-tests/src/test/resources/logback.xml
deleted file mode 100644
index 4dff78d129..0000000000
--- a/smoke-tests/src/test/resources/logback.xml
+++ /dev/null
@@ -1,23 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<configuration>
-
-  <appender name="console" class="ch.qos.logback.core.ConsoleAppender">
-    <layout class="ch.qos.logback.classic.PatternLayout">
-      <Pattern>
-        %d{HH:mm:ss.SSS} %-5level %logger{36} - %msg%n
-      </Pattern>
-    </layout>
-  </appender>
-
-  <root level="WARN">
-    <appender-ref ref="console"/>
-  </root>
-
-  <logger name="io.opentelemetry" level="debug"/>
-  <logger name="org.testcontainers" level="debug"/>
-  <logger name="org.testcontainers.shaded" level="warn"/>
-  <logger name="org.testcontainers.containers.output.WaitingConsumer" level="warn"/>
-  <logger name="Collector" level="debug"/>
-  <logger name="Backend" level="debug"/>
-
-</configuration>
diff --git a/testing-common/src/main/resources/logback.xml b/testing-common/src/main/resources/logback.xml
index cdd4533a10..2605b85855 100644
--- a/testing-common/src/main/resources/logback.xml
+++ b/testing-common/src/main/resources/logback.xml
@@ -2,11 +2,11 @@
 <configuration>
 
   <appender name="console" class="ch.qos.logback.core.ConsoleAppender">
-    <layout class="ch.qos.logback.classic.PatternLayout">
-      <Pattern>
+    <encoder>
+      <pattern>
         %d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
-      </Pattern>
-    </layout>
+      </pattern>
+    </encoder>
   </appender>
 
   <root level="INFO">