diff --git a/compiler/tests-common/tests/org/jetbrains/kotlin/klib/AbstractKlibABITestCase.kt b/compiler/tests-common/tests/org/jetbrains/kotlin/klib/AbstractKlibABITestCase.kt
index 320af13a290..937a493099e 100644
--- a/compiler/tests-common/tests/org/jetbrains/kotlin/klib/AbstractKlibABITestCase.kt
+++ b/compiler/tests-common/tests/org/jetbrains/kotlin/klib/AbstractKlibABITestCase.kt
@@ -54,7 +54,8 @@ abstract class AbstractKlibABITestCase : KtUsefulTestCase() {
         buildDir = buildDir,
         stdlibFile = stdlibFile(),
         buildKlib = ::buildKlib,
-        buildBinaryAndRun = ::buildBinaryAndRun
+        buildBinaryAndRun = ::buildBinaryAndRun,
+        onNonEmptyBuildDirectory = { directory -> directory.listFiles()?.forEach(File::deleteRecursively) }
     )
 
     companion object {
@@ -63,7 +64,8 @@ abstract class AbstractKlibABITestCase : KtUsefulTestCase() {
             buildDir: File,
             stdlibFile: File,
             buildKlib: (moduleName: String, moduleSourceDir: File, moduleDependencies: Collection<File>, klibFile: File) -> Unit,
-            buildBinaryAndRun: (mainModuleKlibFile: File, allDependencies: Collection<File>) -> Unit
+            buildBinaryAndRun: (mainModuleKlibFile: File, allDependencies: Collection<File>) -> Unit,
+            onNonEmptyBuildDirectory: (directory: File) -> Unit
         ) {
             val projectName = testDir.name
 
@@ -111,7 +113,8 @@ abstract class AbstractKlibABITestCase : KtUsefulTestCase() {
                         modification.execute(moduleTestDir, moduleBuildDirs.sourceDir)
                     }
 
-                    if (klibFile.exists()) klibFile.delete() // TODO: maybe backup?
+                    if (!moduleBuildDirs.outputDir.list().isNullOrEmpty())
+                        onNonEmptyBuildDirectory(moduleBuildDirs.outputDir)
 
                     val moduleDependencies = moduleStep.dependencies.map { dependencyName ->
                         if (dependencyName == "stdlib")
diff --git a/native/native.tests/tests/org/jetbrains/kotlin/konan/blackboxtest/AbstractNativeKlibABITest.kt b/native/native.tests/tests/org/jetbrains/kotlin/konan/blackboxtest/AbstractNativeKlibABITest.kt
index f735c875376..4889f865f5d 100644
--- a/native/native.tests/tests/org/jetbrains/kotlin/konan/blackboxtest/AbstractNativeKlibABITest.kt
+++ b/native/native.tests/tests/org/jetbrains/kotlin/konan/blackboxtest/AbstractNativeKlibABITest.kt
@@ -36,7 +36,8 @@ abstract class AbstractNativeKlibABITest : AbstractNativeSimpleTest() {
         buildDir = buildDir,
         stdlibFile = stdlibFile,
         buildKlib = ::buildKlib,
-        buildBinaryAndRun = { _, allDependencies -> buildBinaryAndRun(allDependencies) }
+        buildBinaryAndRun = { _, allDependencies -> buildBinaryAndRun(allDependencies) },
+        onNonEmptyBuildDirectory = ::backupDirectoryContents
     )
 
     private fun buildKlib(moduleName: String, moduleSourceDir: File, moduleDependencies: Collection<File>, klibFile: File) {
@@ -122,5 +123,20 @@ abstract class AbstractNativeKlibABITest : AbstractNativeSimpleTest() {
         )
 
         private val DEFAULT_EXTRAS = WithTestRunnerExtras(TestRunnerType.DEFAULT)
+
+        private const val BACKED_UP_DIRECTORY_PREFIX = "__backup-"
+
+        private fun backupDirectoryContents(directory: File) {
+            val filesToBackup = directory.listFiles()?.mapNotNull { file ->
+                if (file.isDirectory && file.name.startsWith(BACKED_UP_DIRECTORY_PREFIX)) null else file
+            }
+
+            if (!filesToBackup.isNullOrEmpty()) {
+                val backupDirectory = directory.resolve("$BACKED_UP_DIRECTORY_PREFIX${System.currentTimeMillis()}__")
+                backupDirectory.mkdirs()
+
+                filesToBackup.forEach { file -> file.renameTo(backupDirectory.resolve(file.name)) }
+            }
+        }
     }
 }