diff --git a/compiler/test/TestImportedModulesOrderAndOptions.kt b/compiler/test/TestImportedModulesOrderAndOptions.kt
index 0f605275d..979350fa4 100644
--- a/compiler/test/TestImportedModulesOrderAndOptions.kt
+++ b/compiler/test/TestImportedModulesOrderAndOptions.kt
@@ -91,8 +91,7 @@ main {
     }
 }
 """
-        @Suppress("DEPRECATION") // Thread.currentThread().id
-        val filenameBase = "on_the_fly_test_" + Thread.currentThread().id.toString() + "_" + sourceText.hashCode().toUInt().toString(16)
+        val filenameBase = "on_the_fly_test_${sourceText.hashCode().toUInt().toString(16)}"
 
         val filepath = outputDir.resolve("$filenameBase.p8")
         filepath.toFile().writeText(sourceText)
diff --git a/compiler/test/helpers/compileXyz.kt b/compiler/test/helpers/compileXyz.kt
index bd30b7f27..6c2bbffbb 100644
--- a/compiler/test/helpers/compileXyz.kt
+++ b/compiler/test/helpers/compileXyz.kt
@@ -61,8 +61,7 @@ internal fun compileText(
     errors: IErrorReporter? = null,
     writeAssembly: Boolean = true,
 ) : CompilationResult? {
-    @Suppress("DEPRECATION") // Thread.currentThread().id
-    val filePath = outputDir.resolve("on_the_fly_test_" + Thread.currentThread().id.toString() + "_" + sourceText.hashCode().toUInt().toString(16) + ".p8")
+    val filePath = outputDir.resolve("on_the_fly_test_${sourceText.hashCode().toUInt().toString(16)}.p8")
     // we don't assumeNotExists(filePath) - should be ok to just overwrite it
     filePath.toFile().writeText(sourceText)
     return compileFile(platform, optimize, filePath.parent, filePath.name, outputDir,
diff --git a/compiler/test/helpers/paths.kt b/compiler/test/helpers/paths.kt
index 970a584e5..8fdda2662 100644
--- a/compiler/test/helpers/paths.kt
+++ b/compiler/test/helpers/paths.kt
@@ -51,12 +51,3 @@ fun assumeDirectory(pathStr: String): Path = assumeDirectory(Path(pathStr))
 fun assumeDirectory(path: Path, other: String): Path = assumeDirectory(path / other)
 fun assumeDirectory(pathStr: String, other: String): Path = assumeDirectory(Path(pathStr) / other)
 fun assumeDirectory(pathStr: String, other: Path): Path = assumeDirectory(Path(pathStr) / other)
-
-
-@Deprecated(
-    "Directories are checked automatically at init.",
-    ReplaceWith("/* nothing */")
-)
-@Suppress("UNUSED_PARAMETER")
-fun sanityCheckDirectories(workingDirName: String? = null) {
-}
diff --git a/docs/source/todo.rst b/docs/source/todo.rst
index 052c94c56..9bed8782c 100644
--- a/docs/source/todo.rst
+++ b/docs/source/todo.rst
@@ -1,9 +1,6 @@
 TODO
 ====
 
-- in unit test helpers: replace own temp file name creation by kotest tempfile(), instead of using Thread.currentThread().id, which is deprecated in newer Java versions
-
-
 - Look at github PR for improved romability (see github issue 149)  Also search for "TODO: Romable"
 
 ...