diff --git a/compiler/tests/org/jetbrains/kotlin/code/ModulesDependenciesTest.kt b/compiler/tests/org/jetbrains/kotlin/code/ModulesDependenciesTest.kt
index aa51b6277f2..24cb0348d0d 100644
--- a/compiler/tests/org/jetbrains/kotlin/code/ModulesDependenciesTest.kt
+++ b/compiler/tests/org/jetbrains/kotlin/code/ModulesDependenciesTest.kt
@@ -55,7 +55,7 @@ class ModulesDependenciesTest : TestCase() {
 
         TestCase.assertTrue("Number of modules have dependencies to module $COMPILER_TESTS_MODULE_NAME. Such dependencies can cause multiple " +
                             "tests execution on teamcity when running configuration with 'Search tests across module dependencies' enabled:\n" +
-                            "${badModulesList.joinToString(separator = "\n")}",
+                            badModulesList.joinToString(separator = "\n"),
                             badModulesList.isEmpty())
     }
 
diff --git a/compiler/tests/org/jetbrains/kotlin/jvm/compiler/AbstractWriteSignatureTest.kt b/compiler/tests/org/jetbrains/kotlin/jvm/compiler/AbstractWriteSignatureTest.kt
index c1e17e6f139..be702e9e938 100644
--- a/compiler/tests/org/jetbrains/kotlin/jvm/compiler/AbstractWriteSignatureTest.kt
+++ b/compiler/tests/org/jetbrains/kotlin/jvm/compiler/AbstractWriteSignatureTest.kt
@@ -249,7 +249,7 @@ abstract class AbstractWriteSignatureTest : TestCaseWithTmpdir() {
     companion object {
         fun formatSignature(header: String, jvmSignature: String?, genericSignature: String): String {
             return listOf(
-                    "$header",
+                    header,
                     jvmSignature?.let { "jvm signature: $it" },
                     "generic signature: $genericSignature"
             ).filterNotNull().joinToString("\n") { "// $it" }
diff --git a/generators/infrastructure/increment-version.kts b/generators/infrastructure/increment-version.kts
index f9d6e6f0b4a..06368fe0237 100644
--- a/generators/infrastructure/increment-version.kts
+++ b/generators/infrastructure/increment-version.kts
@@ -40,7 +40,7 @@ fun main(args: Array<String>) {
 
     println("prefix=$versionPrefix incrementPart=$incrementPart result=$result filePath=$filePath")
 
-    File("$filePath").writeText("$result")
+    File(filePath).writeText(result)
 }
 
 main(args)
diff --git a/idea/idea-analysis/src/org/jetbrains/kotlin/idea/quickfix/KotlinSuppressIntentionAction.kt b/idea/idea-analysis/src/org/jetbrains/kotlin/idea/quickfix/KotlinSuppressIntentionAction.kt
index 78a6b4126bd..2de901bd436 100644
--- a/idea/idea-analysis/src/org/jetbrains/kotlin/idea/quickfix/KotlinSuppressIntentionAction.kt
+++ b/idea/idea-analysis/src/org/jetbrains/kotlin/idea/quickfix/KotlinSuppressIntentionAction.kt
@@ -54,7 +54,7 @@ class KotlinSuppressIntentionAction private constructor(
         when (suppressAt) {
             is KtModifierListOwner ->
                 suppressAt.addAnnotation(KotlinBuiltIns.FQ_NAMES.suppress.toSafe(),
-                                         "$id",
+                                         id,
                                          whiteSpaceText = if (kind.newLineNeeded) "\n" else " ",
                                          addToExistingAnnotation = { entry ->
                                              addArgumentToSuppressAnnotation(entry, id)
diff --git a/idea/idea-repl/src/org/jetbrains/kotlin/console/CommandExecutor.kt b/idea/idea-repl/src/org/jetbrains/kotlin/console/CommandExecutor.kt
index dbf34a67f86..b3021c7be0e 100644
--- a/idea/idea-repl/src/org/jetbrains/kotlin/console/CommandExecutor.kt
+++ b/idea/idea-repl/src/org/jetbrains/kotlin/console/CommandExecutor.kt
@@ -51,11 +51,11 @@ class CommandExecutor(private val runner: KotlinConsoleRunner) {
         val processInputOS = processHandler.processInput ?: return logError(javaClass, "<p>Broken process stream</p>")
         val charset = (processHandler as? BaseOSProcessHandler)?.charset ?: Charsets.UTF_8
 
-        val xmlRes = "$XML_PREAMBLE" +
+        val xmlRes = XML_PREAMBLE +
                      "<input>" +
-                     "${StringUtil.escapeXml(
+                     StringUtil.escapeXml(
                              StringUtil.replace(command, SOURCE_CHARS, XML_REPLACEMENTS)
-                     )}" +
+                     ) +
                      "</input>"
 
         val bytes = ("$xmlRes\n").toByteArray(charset)
diff --git a/idea/src/org/jetbrains/kotlin/idea/refactoring/elementRenderingUtils.kt b/idea/src/org/jetbrains/kotlin/idea/refactoring/elementRenderingUtils.kt
index 3ca6c6f053f..a5537a06065 100644
--- a/idea/src/org/jetbrains/kotlin/idea/refactoring/elementRenderingUtils.kt
+++ b/idea/src/org/jetbrains/kotlin/idea/refactoring/elementRenderingUtils.kt
@@ -76,13 +76,13 @@ fun KtElement.renderTrimmed(): String {
         }
 
         override fun visitPrefixExpression(expression: KtPrefixExpression) {
-            builder.append("${expression.operationReference.getReferencedName()}")
+            builder.append(expression.operationReference.getReferencedName())
             expression.baseExpression?.accept(this)
         }
 
         override fun visitPostfixExpression(expression: KtPostfixExpression) {
             expression.baseExpression?.accept(this)
-            builder.append("${expression.operationReference.getReferencedName()}")
+            builder.append(expression.operationReference.getReferencedName())
         }
 
         override fun visitBinaryExpression(expression: KtBinaryExpression) {