diff --git a/compiler/frontend/src/org/jetbrains/kotlin/diagnostics/Errors.java b/compiler/frontend/src/org/jetbrains/kotlin/diagnostics/Errors.java
index f71af5f2052..7fcad2ce48a 100644
--- a/compiler/frontend/src/org/jetbrains/kotlin/diagnostics/Errors.java
+++ b/compiler/frontend/src/org/jetbrains/kotlin/diagnostics/Errors.java
@@ -1176,7 +1176,7 @@ public interface Errors {
     DiagnosticFactory0<PsiElement> ILLEGAL_RESTRICTED_SUSPENDING_FUNCTION_CALL = DiagnosticFactory0.create(ERROR);
     DiagnosticFactory0<PsiElement> NON_MODIFIER_FORM_FOR_BUILT_IN_SUSPEND = DiagnosticFactory0.create(ERROR);
     DiagnosticFactory0<KtReturnExpression> RETURN_FOR_BUILT_IN_SUSPEND = DiagnosticFactory0.create(ERROR);
-    DiagnosticFactory0<PsiElement> MODIFIER_FORM_FOR_NON_BUILT_IN_SUSPEND = DiagnosticFactory0.create(WARNING);
+    DiagnosticFactory0<PsiElement> MODIFIER_FORM_FOR_NON_BUILT_IN_SUSPEND = DiagnosticFactory0.create(ERROR);
 
     DiagnosticFactory1<PsiElement, RenderedDiagnostic<?>> PLUGIN_ERROR = DiagnosticFactory1.create(ERROR);
     DiagnosticFactory1<PsiElement, RenderedDiagnostic<?>> PLUGIN_WARNING = DiagnosticFactory1.create(WARNING);
diff --git a/libraries/stdlib/test/coroutines/CoroutinesReferenceValuesTest.kt b/libraries/stdlib/test/coroutines/CoroutinesReferenceValuesTest.kt
index aff6ae58772..0404769d8f4 100644
--- a/libraries/stdlib/test/coroutines/CoroutinesReferenceValuesTest.kt
+++ b/libraries/stdlib/test/coroutines/CoroutinesReferenceValuesTest.kt
@@ -37,7 +37,7 @@ class CoroutinesReferenceValuesTest {
 
     @Test
     fun testBadClass() {
-        val bad = suspend {
+        val bad = suspend() {
             checkBadClassTwice()
             getBadClassViaSuspend()
         }