diff --git a/platform/platform-tests/testSrc/com/intellij/ui/ExtendableTextFieldTest.kt b/platform/platform-tests/testSrc/com/intellij/ui/ExtendableTextFieldTest.kt
index bb3f912c1501..f16e604cee1c 100644
--- a/platform/platform-tests/testSrc/com/intellij/ui/ExtendableTextFieldTest.kt
+++ b/platform/platform-tests/testSrc/com/intellij/ui/ExtendableTextFieldTest.kt
@@ -7,6 +7,7 @@ import com.intellij.testFramework.junit5.TestApplication
 import com.intellij.ui.components.fields.ExtendableTextComponent
 import com.intellij.ui.components.fields.ExtendableTextField
 import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.assertDoesNotThrow
 import javax.swing.JButton
 import kotlin.test.assertEquals
 import kotlin.test.assertTrue
@@ -43,4 +44,15 @@ class ExtendableTextFieldTest {
     val buttons = textField.components.filterIsInstance<JButton>()
     assertTrue(buttons.isEmpty())
   }
+}
+
+class ExtendableTextFieldTestWithoutApplication {
+  @Test
+  fun `adding extension doesn't throw without application`() {
+    assertDoesNotThrow {
+      val textField = ExtendableTextField()
+      val extension = ExtendableTextComponent.Extension.create(AllIcons.General.Add, AllIcons.General.Add, "Add", true) {}
+      textField.addExtension(extension)
+    }
+  }
 }
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