diff --git a/lang/js/src/main/scala/JsAPI.scala b/lang/js/src/main/scala/com/wavesplatform/JsAPI.scala
similarity index 99%
rename from lang/js/src/main/scala/JsAPI.scala
rename to lang/js/src/main/scala/com/wavesplatform/JsAPI.scala
index 92a8d947a3a..7a5f3eae35d 100644
--- a/lang/js/src/main/scala/JsAPI.scala
+++ b/lang/js/src/main/scala/com/wavesplatform/JsAPI.scala
@@ -1,3 +1,5 @@
+package com.wavesplatform
+
 import JsApiUtils.*
 import com.wavesplatform.DocSource
 import com.wavesplatform.lang.*
diff --git a/lang/js/src/main/scala/JsApiUtils.scala b/lang/js/src/main/scala/com/wavesplatform/JsApiUtils.scala
similarity index 90%
rename from lang/js/src/main/scala/JsApiUtils.scala
rename to lang/js/src/main/scala/com/wavesplatform/JsApiUtils.scala
index fdf15621f4d..68d66f78eae 100644
--- a/lang/js/src/main/scala/JsApiUtils.scala
+++ b/lang/js/src/main/scala/com/wavesplatform/JsApiUtils.scala
@@ -1,3 +1,5 @@
+package com.wavesplatform
+
 import com.wavesplatform.lang.contract.DApp
 import com.wavesplatform.lang.v1.FunctionHeader.{Native, User}
 import com.wavesplatform.lang.v1.compiler.CompilationError
@@ -14,7 +16,7 @@ import scala.scalajs.js.JSConverters._
 object JsApiUtils {
 
   def serPart[T](f: T => js.Any)(part: PART[T]): js.Object = {
-    val partValue = Expressions.PART.toOption(part).fold(null:Any)(f)
+    val partValue = Expressions.PART.toOption(part).fold(null: Any)(f)
     jObj.applyDynamic("apply")(
       "value"    -> partValue,
       "posStart" -> part.position.start,
@@ -55,11 +57,11 @@ object JsApiUtils {
     }
 
     jObj.applyDynamic("apply")(
-      "type"         -> "DAPP",
-      "posStart"     -> ast.position.start,
-      "posEnd"       -> ast.position.end,
-      "decList"      -> ast.decs.map(serDec).toJSArray,
-      "annFuncList"  -> ast.fs.map(serAnnFunc).toJSArray
+      "type"        -> "DAPP",
+      "posStart"    -> ast.position.start,
+      "posEnd"      -> ast.position.end,
+      "decList"     -> ast.decs.map(serDec).toJSArray,
+      "annFuncList" -> ast.fs.map(serAnnFunc).toJSArray
     )
   }
 
@@ -146,8 +148,8 @@ object JsApiUtils {
 
       case Expressions.FOLD(_, limit, value, acc, func, _, _) =>
         val additionalDataObj = jObj.applyDynamic("apply")(
-          "name"  -> s"FOLD<$limit>",
-          "args"  -> js.Array(serExpr(value), serExpr(acc), func.key.toString: js.Any)
+          "name" -> s"FOLD<$limit>",
+          "args" -> js.Array(serExpr(value), serExpr(acc), func.key.toString: js.Any)
         )
         mergeJSObjects(commonDataObj, additionalDataObj)
 
@@ -173,7 +175,9 @@ object JsApiUtils {
   }
 
   def serMatchCase(c: Expressions.MATCH_CASE, simpleCtx: Map[String, Pos]): js.Object = {
-    val vars = c.pattern.subpatterns.collect { case (Expressions.TypedVar(Some(newVarName), caseType), _) => (serPartStr(newVarName), serType(caseType)) }
+    val vars = c.pattern.subpatterns.collect { case (Expressions.TypedVar(Some(newVarName), caseType), _) =>
+      (serPartStr(newVarName), serType(caseType))
+    }
     jObj.applyDynamic("apply")(
       "type"       -> "MATCH_CASE",
       "posStart"   -> c.position.start,
@@ -200,7 +204,7 @@ object JsApiUtils {
     t match {
       case Expressions.AnyType(_) =>
         jObj.applyDynamic("apply")(
-          "typeName"  -> "Any"
+          "typeName" -> "Any"
         )
       case Expressions.Single(name, parameter) =>
         jObj.applyDynamic("apply")(
@@ -255,21 +259,25 @@ object JsApiUtils {
   def toJs(ast: EXPR): js.Object = {
     def r(expr: EXPR): js.Object = {
       expr match {
-        case CONST_LONG(t)      => jObj.applyDynamic("apply")("type" -> "LONG", "value"    -> t.toDouble)
-        case GETTER(ref, field) => jObj.applyDynamic("apply")("type" -> "GETTER", "ref"    -> r(ref), "field" -> field)
+        case CONST_LONG(t)      => jObj.applyDynamic("apply")("type" -> "LONG", "value" -> t.toDouble)
+        case GETTER(ref, field) => jObj.applyDynamic("apply")("type" -> "GETTER", "ref" -> r(ref), "field" -> field)
         case CONST_BYTESTR(bs)  => jObj.applyDynamic("apply")("type" -> "BYTESTR", "value" -> bs.arr.toJSArray)
-        case CONST_STRING(s)    => jObj.applyDynamic("apply")("type" -> "STRING", "value"  -> s)
+        case CONST_STRING(s)    => jObj.applyDynamic("apply")("type" -> "STRING", "value" -> s)
         case LET_BLOCK(let, body) =>
           jObj.applyDynamic("apply")("type" -> "BLOCK", "let" -> jObj("name" -> let.name, "value" -> r(let.value)), "body" -> r(body))
         case IF(cond, ifTrue, ifFalse) =>
           jObj.applyDynamic("apply")("type" -> "IF", "condition" -> r(cond), "true" -> r(ifTrue), "false" -> r(ifFalse))
-        case REF(key)         => jObj.applyDynamic("apply")("type" -> "REF", "key"    -> key)
+        case REF(key)         => jObj.applyDynamic("apply")("type" -> "REF", "key" -> key)
         case CONST_BOOLEAN(b) => jObj.applyDynamic("apply")("type" -> "BOOL", "value" -> b)
         case FUNCTION_CALL(function, args) =>
-          jObj.applyDynamic("apply")("type" -> "CALL", "name" -> (function match {
-            case Native(name)          => name.toString()
-            case User(internalName, _) => internalName
-          }), "args" -> args.map(r).toJSArray)
+          jObj.applyDynamic("apply")(
+            "type" -> "CALL",
+            "name" -> (function match {
+              case Native(name)          => name.toString()
+              case User(internalName, _) => internalName
+            }),
+            "args" -> args.map(r).toJSArray
+          )
         case t => jObj.applyDynamic("apply")("[not_supported]stringRepr" -> t.toString)
       }
     }
diff --git a/lang/tests-js/src/test/scala/DAppComplexities.scala b/lang/tests-js/src/test/scala/com/wavesplatform/DAppComplexities.scala
similarity index 89%
rename from lang/tests-js/src/test/scala/DAppComplexities.scala
rename to lang/tests-js/src/test/scala/com/wavesplatform/DAppComplexities.scala
index 1876fb85215..892522f1c59 100644
--- a/lang/tests-js/src/test/scala/DAppComplexities.scala
+++ b/lang/tests-js/src/test/scala/com/wavesplatform/DAppComplexities.scala
@@ -1,3 +1,5 @@
+package com.wavesplatform
+
 case class DAppComplexities(
     complexity: Int,
     verifierComplexity: Int,
diff --git a/lang/tests-js/src/test/scala/Global.scala b/lang/tests-js/src/test/scala/com/wavesplatform/Global.scala
similarity index 91%
rename from lang/tests-js/src/test/scala/Global.scala
rename to lang/tests-js/src/test/scala/com/wavesplatform/Global.scala
index f8a49245087..99a61503521 100644
--- a/lang/tests-js/src/test/scala/Global.scala
+++ b/lang/tests-js/src/test/scala/com/wavesplatform/Global.scala
@@ -1,3 +1,5 @@
+package com.wavesplatform
+
 import scala.scalajs.js.annotation.JSExportTopLevel
 import scala.scalajs.js.typedarray.ArrayBuffer
 
diff --git a/lang/tests-js/src/test/scala/JsAPITest.scala b/lang/tests-js/src/test/scala/com/wavesplatform/JsAPITest.scala
similarity index 99%
rename from lang/tests-js/src/test/scala/JsAPITest.scala
rename to lang/tests-js/src/test/scala/com/wavesplatform/JsAPITest.scala
index 88f74e9100c..25416408df5 100644
--- a/lang/tests-js/src/test/scala/JsAPITest.scala
+++ b/lang/tests-js/src/test/scala/com/wavesplatform/JsAPITest.scala
@@ -1,3 +1,5 @@
+package com.wavesplatform
+
 import com.wavesplatform.lang.directives.values.{V5, V6}
 import utest.*
 
diff --git a/lang/tests-js/src/test/scala/JsTestBase.scala b/lang/tests-js/src/test/scala/com/wavesplatform/JsTestBase.scala
similarity index 98%
rename from lang/tests-js/src/test/scala/JsTestBase.scala
rename to lang/tests-js/src/test/scala/com/wavesplatform/JsTestBase.scala
index 6f2e970a747..ac04371ba18 100644
--- a/lang/tests-js/src/test/scala/JsTestBase.scala
+++ b/lang/tests-js/src/test/scala/com/wavesplatform/JsTestBase.scala
@@ -1,3 +1,5 @@
+package com.wavesplatform
+
 import com.wavesplatform.lang.directives.values.{StdLibVersion, V6}
 import utest.{TestSuite, assert}