diff --git a/compiler/daemon/daemon-common/src/org/jetbrains/kotlin/daemon/common/DaemonParams.kt b/compiler/daemon/daemon-common/src/org/jetbrains/kotlin/daemon/common/DaemonParams.kt
index 243a6dd027d43..9d28cdda30f19 100644
--- a/compiler/daemon/daemon-common/src/org/jetbrains/kotlin/daemon/common/DaemonParams.kt
+++ b/compiler/daemon/daemon-common/src/org/jetbrains/kotlin/daemon/common/DaemonParams.kt
@@ -226,9 +226,6 @@ fun Iterable<String>.distinctStringsDigest(): ByteArray =
         MessageDigest.getInstance(CLASSPATH_ID_DIGEST)
                 .digest(this.distinct().sorted().joinToString("").toByteArray())
 
-fun ByteArray.toHexString(): String = joinToString("", transform = { "%02x".format(it) })
-
-
 data class CompilerId(
         var compilerClasspath: List<String> = listOf(),
         var compilerVersion: String = ""
diff --git a/libraries/scripting/jvm-host-test/test/kotlin/script/experimental/jvmhost/test/CachingTest.kt b/libraries/scripting/jvm-host-test/test/kotlin/script/experimental/jvmhost/test/CachingTest.kt
index e0e0357b78ec0..da6872e7776c3 100644
--- a/libraries/scripting/jvm-host-test/test/kotlin/script/experimental/jvmhost/test/CachingTest.kt
+++ b/libraries/scripting/jvm-host-test/test/kotlin/script/experimental/jvmhost/test/CachingTest.kt
@@ -424,8 +424,6 @@ private fun File.readCompiledScript(): CompiledScript {
     }
 }
 
-private fun ByteArray.toHexString(): String = joinToString("", transform = { "%02x".format(it) })
-
 private fun Class<*>.supertypes(): MutableList<Class<*>> = when {
     superclass == null -> interfaces.toMutableList()
     interfaces.isEmpty() -> mutableListOf(superclass)
diff --git a/libraries/stdlib/samples/test/samples/text/hexFormat.kt b/libraries/stdlib/samples/test/samples/text/hexFormat.kt
index f9e41a1c2b59c..efc38dfb8c7f1 100644
--- a/libraries/stdlib/samples/test/samples/text/hexFormat.kt
+++ b/libraries/stdlib/samples/test/samples/text/hexFormat.kt
@@ -625,4 +625,4 @@ class HexFormats {
             assertFailsWith<IllegalArgumentException> { "3A".hexToLong(format) }
         }
     }
-}
\ No newline at end of file
+}
diff --git a/libraries/tools/kotlin-gradle-statistics/src/test/kotlin/org/jetbrains/kotlin/statistics/ModuleChangesCatchingTest.kt b/libraries/tools/kotlin-gradle-statistics/src/test/kotlin/org/jetbrains/kotlin/statistics/ModuleChangesCatchingTest.kt
index 4f63a1d441998..48f5121842983 100644
--- a/libraries/tools/kotlin-gradle-statistics/src/test/kotlin/org/jetbrains/kotlin/statistics/ModuleChangesCatchingTest.kt
+++ b/libraries/tools/kotlin-gradle-statistics/src/test/kotlin/org/jetbrains/kotlin/statistics/ModuleChangesCatchingTest.kt
@@ -129,8 +129,4 @@ class ModuleChangesCatchingTest {
         return MessageDigest.getInstance(HASH_ALG).digest(this)
     }
 
-    private fun ByteArray.convertToHexString(): String {
-        return this.joinToString("") { "%02x".format(it) }
-    }
-
 }
diff --git a/libraries/tools/kotlin-main-kts/src/org/jetbrains/kotlin/mainKts/scriptDef.kt b/libraries/tools/kotlin-main-kts/src/org/jetbrains/kotlin/mainKts/scriptDef.kt
index bc8cebf2c945f..8b7048dc7f45f 100644
--- a/libraries/tools/kotlin-main-kts/src/org/jetbrains/kotlin/mainKts/scriptDef.kt
+++ b/libraries/tools/kotlin-main-kts/src/org/jetbrains/kotlin/mainKts/scriptDef.kt
@@ -239,7 +239,5 @@ private fun compiledScriptUniqueName(script: SourceCode, scriptCompilationConfig
     return digestWrapper.digest().toHexString()
 }
 
-private fun ByteArray.toHexString(): String = joinToString("", transform = { "%02x".format(it) })
-
 private fun Int.toByteArray() = ByteBuffer.allocate(Int.SIZE_BYTES).also { it.putInt(this) }.array()