diff --git a/timber/src/main/java/timber/log/Timber.kt b/timber/src/main/java/timber/log/Timber.kt
index 62b6a0759..8f6e0f13b 100644
--- a/timber/src/main/java/timber/log/Timber.kt
+++ b/timber/src/main/java/timber/log/Timber.kt
@@ -193,13 +193,13 @@ class Timber private constructor() {
   }
 
   /** A [Tree] for debug builds. Automatically infers the tag from the calling class. */
-  open class DebugTree : Tree() {
-    private val fqcnIgnore = listOf(
+  open class DebugTree(vararg ignoredClasses: Class<*>) : Tree() {
+    private val fqcnIgnore = setOf(
         Timber::class.java.name,
         Timber.Forest::class.java.name,
         Tree::class.java.name,
         DebugTree::class.java.name
-    )
+    ).plus(ignoredClasses.map { it.name })
 
     override val tag: String?
       get() = super.tag ?: Throwable().stackTrace
diff --git a/timber/src/test/java/timber/log/TimberTest.kt b/timber/src/test/java/timber/log/TimberTest.kt
index 126c50dc9..37ffc598a 100644
--- a/timber/src/test/java/timber/log/TimberTest.kt
+++ b/timber/src/test/java/timber/log/TimberTest.kt
@@ -209,6 +209,17 @@ class TimberTest {
         .hasNoMoreMessages()
   }
 
+  @Test fun debugTreeDoesNotUseIgnoredClassForTag() {
+    val tree = Timber.DebugTree(ThisIsAReallyLongClassName::class.java)
+    Timber.plant(tree)
+
+    ThisIsAReallyLongClassName().run()
+
+    assertLog()
+        .hasDebugMessage("TimberTest", "Hello, world!")
+        .hasNoMoreMessages()
+  }
+
   @Test fun debugTreeCustomTag() {
     Timber.plant(Timber.DebugTree())
     Timber.tag("Custom").d("Hello, world!")