diff --git a/okio-testing-support/src/commonMain/kotlin/okio/AbstractFileSystemTest.kt b/okio-testing-support/src/commonMain/kotlin/okio/AbstractFileSystemTest.kt
index 9ed87c3b64..2609852811 100644
--- a/okio-testing-support/src/commonMain/kotlin/okio/AbstractFileSystemTest.kt
+++ b/okio-testing-support/src/commonMain/kotlin/okio/AbstractFileSystemTest.kt
@@ -42,6 +42,7 @@ abstract class AbstractFileSystemTest(
   val windowsLimitations: Boolean,
   val allowClobberingEmptyDirectories: Boolean,
   val allowAtomicMoveFromFileToDirectory: Boolean,
+  val allowRenameWhenTargetIsOpen: Boolean = !windowsLimitations,
   temporaryDirectory: Path,
 ) {
   val base: Path = temporaryDirectory / "${this::class.simpleName}-${randomToken(16)}"
@@ -1501,10 +1502,15 @@ abstract class AbstractFileSystemTest(
     val to = base / "to.txt"
     from.writeUtf8("source file")
     to.writeUtf8("target file")
-    expectIOExceptionOnWindows {
+
+    val expectCrash = !allowRenameWhenTargetIsOpen
+    try {
       fileSystem.source(to).use {
         fileSystem.atomicMove(from, to)
       }
+      assertFalse(expectCrash)
+    } catch (_: IOException) {
+      assertTrue(expectCrash)
     }
   }
 
diff --git a/okio/src/jvmTest/kotlin/okio/FileHandleFileSystemTest.kt b/okio/src/jvmTest/kotlin/okio/FileHandleFileSystemTest.kt
index 9a41e37ff0..06baf8a060 100644
--- a/okio/src/jvmTest/kotlin/okio/FileHandleFileSystemTest.kt
+++ b/okio/src/jvmTest/kotlin/okio/FileHandleFileSystemTest.kt
@@ -17,8 +17,8 @@ package okio
 
 import com.google.common.jimfs.Configuration
 import com.google.common.jimfs.Jimfs
+import java.nio.file.FileSystems
 import kotlinx.datetime.Clock
-import okio.FileHandleFileSystemTest.FileHandleTestingFileSystem
 import okio.FileSystem.Companion.asOkioFileSystem
 
 /**
@@ -73,3 +73,13 @@ class FileHandleNioFileSystemWrapperFileSystemTest : AbstractFileSystemTest(
   allowAtomicMoveFromFileToDirectory = true,
   temporaryDirectory = FileSystem.SYSTEM_TEMPORARY_DIRECTORY,
 )
+
+class FileHandleNioDefaultFileSystemWrapperFileSystemTest : AbstractFileSystemTest(
+  clock = Clock.System,
+  fileSystem = FileSystems.getDefault().asOkioFileSystem(),
+  windowsLimitations = false,
+  allowClobberingEmptyDirectories = Path.DIRECTORY_SEPARATOR == "\\",
+  allowAtomicMoveFromFileToDirectory = false,
+  allowRenameWhenTargetIsOpen = Path.DIRECTORY_SEPARATOR != "\\",
+  temporaryDirectory = FileSystem.SYSTEM_TEMPORARY_DIRECTORY,
+)