diff --git a/compiler/backend/src/org/jetbrains/kotlin/codegen/ClassFileFactory.java b/compiler/backend/src/org/jetbrains/kotlin/codegen/ClassFileFactory.java
index 70253a576db..38070e3cb99 100644
--- a/compiler/backend/src/org/jetbrains/kotlin/codegen/ClassFileFactory.java
+++ b/compiler/backend/src/org/jetbrains/kotlin/codegen/ClassFileFactory.java
@@ -121,7 +121,6 @@ public class ClassFileFactory implements OutputFileCollection {
         }
 
         JvmModuleProtoBuf.Module moduleProto = builder.build();
-        if (moduleProto.getSerializedSize() == 0) return;
 
         generators.put(outputFilePath, new OutAndSourceFileList(CollectionsKt.toList(packagePartSourceFiles)) {
             @Override
diff --git a/libraries/tools/kotlinp/testData/Annotations.txt b/libraries/tools/kotlinp/testData/Annotations.txt
index d8dc603913a..915964669ba 100644
--- a/libraries/tools/kotlinp/testData/Annotations.txt
+++ b/libraries/tools/kotlinp/testData/Annotations.txt
@@ -106,3 +106,7 @@ public final class C : kotlin/Any {
   // signature: typeAnnotation()V
   public final fun typeAnnotation(): @A(z = true, c = 'x', b = 1.toByte(), s = 42.toShort(), i = 42424242, f = -2.72f, j = 239239239239239L, d = 3.14, za = [true], ca = ['\''], ba = [1.toByte()], sa = [42.toShort()], ia = [42424242], fa = [-2.72f], ja = [239239239239239L], da = [3.14], str = "aba\ncaba'\"\t\u0001\u0002ꙮ", enum = kotlin/annotation/AnnotationTarget.CLASS, klass = C::class, anno = B(value = "aba\ncaba'\"\t\u0001\u0002ꙮ")) kotlin/Unit
 }
+// META-INF/test-module.kotlin_module
+// ------------------------------------------
+module {
+}
diff --git a/libraries/tools/kotlinp/testData/LocalClass.txt b/libraries/tools/kotlinp/testData/LocalClass.txt
index 6845ed621b8..c589c7f49e3 100644
--- a/libraries/tools/kotlinp/testData/LocalClass.txt
+++ b/libraries/tools/kotlinp/testData/LocalClass.txt
@@ -24,3 +24,7 @@ local final inner class .A$L.I : kotlin/Any {
   // signature: <init>(LA$L;)V
   public /* primary */ constructor()
 }
+// META-INF/test-module.kotlin_module
+// ------------------------------------------
+module {
+}
diff --git a/libraries/tools/kotlinp/testData/NestedClasses.txt b/libraries/tools/kotlinp/testData/NestedClasses.txt
index e0ff2d096d2..553f7738c8a 100644
--- a/libraries/tools/kotlinp/testData/NestedClasses.txt
+++ b/libraries/tools/kotlinp/testData/NestedClasses.txt
@@ -58,3 +58,7 @@ public final class A.D.F.G : A.D.F {
   // signature: <init>()V
   public /* primary */ constructor()
 }
+// META-INF/test-module.kotlin_module
+// ------------------------------------------
+module {
+}
diff --git a/libraries/tools/kotlinp/testData/PlatformType.txt b/libraries/tools/kotlinp/testData/PlatformType.txt
index 3463b93b8cc..aad34e318ea 100644
--- a/libraries/tools/kotlinp/testData/PlatformType.txt
+++ b/libraries/tools/kotlinp/testData/PlatformType.txt
@@ -11,3 +11,7 @@ public final class PlatformType : kotlin/Any {
   // signature: nullability()Ljava/io/File;
   public final fun nullability(): java/io/File!
 }
+// META-INF/test-module.kotlin_module
+// ------------------------------------------
+module {
+}
diff --git a/libraries/tools/kotlinp/testData/SimpleClass.txt b/libraries/tools/kotlinp/testData/SimpleClass.txt
index c0c7a52de1e..cfc24e30387 100644
--- a/libraries/tools/kotlinp/testData/SimpleClass.txt
+++ b/libraries/tools/kotlinp/testData/SimpleClass.txt
@@ -27,3 +27,7 @@ public final class SimpleClass<in T#0 /* A */> : kotlin/Any {
     public final /* non-default */ external get
     public final /* non-default */ set(<set-?>: kotlin/Long)
 }
+// META-INF/test-module.kotlin_module
+// ------------------------------------------
+module {
+}
diff --git a/libraries/tools/kotlinp/testData/TypeParameters.txt b/libraries/tools/kotlinp/testData/TypeParameters.txt
index 7172b3151f6..375d56d626d 100644
--- a/libraries/tools/kotlinp/testData/TypeParameters.txt
+++ b/libraries/tools/kotlinp/testData/TypeParameters.txt
@@ -41,3 +41,7 @@ public final inner class A.B.C<T#3 /* T */, T#4 /* U */> : kotlin/Any {
   // signature: z(LA$B$C;)V
   public final fun z(c: A<kotlin/Int>.B<kotlin/Any, kotlin/Byte>.C<kotlin/Unit, kotlin/Long>): kotlin/Unit
 }
+// META-INF/test-module.kotlin_module
+// ------------------------------------------
+module {
+}