diff --git a/packages/client/src/highlighter.ts b/packages/client/src/highlighter.ts
index ac629d9..4936ec3 100644
--- a/packages/client/src/highlighter.ts
+++ b/packages/client/src/highlighter.ts
@@ -10,10 +10,6 @@ const convertToVSCPosition = (position: WollokPosition) =>
 
 const convertToVSCTokens = (wollokNodesPlotter: WollokNodePlotter[]) =>
   wollokNodesPlotter
-    .filter(wollokNodePlotter => {
-      const { range } = wollokNodePlotter
-      return !!range && range.start && range.end
-    })
     .map(wollokNodePlotter => {
       const { range } = wollokNodePlotter
       const { start, end } = range
@@ -38,7 +34,8 @@ export const provider: vscode.DocumentSemanticTokensProvider = {
     const splittedLines = textFile.split('\n')
     const processed = excludeNullish([]
       .concat(convertToVSCTokens(processCode(parsedPackage.members[0], splittedLines)))
-      .concat(processComments(splittedLines)))
+      .concat(processComments(splittedLines))
+    )
 
     processed.forEach((node: WollokNodePlotter) =>
       tokensBuilder.push(node.range as unknown as vscode.Range, node.tokenType, node.tokenModifiers)
diff --git a/packages/client/src/highlighter/tokenProvider.ts b/packages/client/src/highlighter/tokenProvider.ts
index 612b8f0..042a1e0 100644
--- a/packages/client/src/highlighter/tokenProvider.ts
+++ b/packages/client/src/highlighter/tokenProvider.ts
@@ -105,11 +105,14 @@ function processNode(node: Node, documentoStr: string[], context: NodeContext[])
       if (node.sourceMap == undefined) return nullHighlighting
       const currentNode = node as unknown as NamedNode
       const validName = node.name !== undefined && node.name.trim().length
-      return { result: [
-        !node.isClosure() ? defaultKeywordPlotter(node) : [],
-        node.supertypes.length ? keywordPlotter(node, KEYWORDS.INHERITS) : [],
-        validName ? generatePlotterForNode(currentNode) : [],
-      ], references: validName ? saveReference(currentNode) : undefined }
+      const result = []
+      if (!node.isClosure()) result.push(defaultKeywordPlotter(node))
+      if (node.supertypes.length) result.push(keywordPlotter(node, KEYWORDS.INHERITS))
+      if (validName) result.push(generatePlotterForNode(currentNode))
+      return {
+        result,
+        references: validName ? saveReference(currentNode) : undefined,
+      }
     }),
     when(Field)(node =>
       node.isSynthetic ? nullHighlighting : resultForReference(node)
diff --git a/packages/client/src/test/highlighter/inheritance.test.ts b/packages/client/src/test/highlighter/inheritance.test.ts
index 7939d28..b0426e1 100644
--- a/packages/client/src/test/highlighter/inheritance.test.ts
+++ b/packages/client/src/test/highlighter/inheritance.test.ts
@@ -53,7 +53,6 @@ suite('inheritance sample', () => {
   })
 
   test('highlights class names', () => {
-    console.info(JSON.stringify(processed.filter(t => t.tokenType === 'class')))
     const keywordsTokens = processedByTokenType(processed, 'class')
 
     const nextRange = () => keywordsTokens.next().value.range
diff --git a/packages/client/src/test/highlighter/utils.ts b/packages/client/src/test/highlighter/utils.ts
index d486582..b4abf66 100644
--- a/packages/client/src/test/highlighter/utils.ts
+++ b/packages/client/src/test/highlighter/utils.ts
@@ -3,12 +3,20 @@ import { readFileSync } from 'fs'
 import { processCode, processComments } from '../../highlighter/tokenProvider'
 import { WollokNodePlotter } from '../../highlighter/utils'
 
+const validateHighlighter = (wollokNodesPlotter: WollokNodePlotter[]) =>
+  wollokNodesPlotter.every(wollokNodePlotter => {
+    const { range } = wollokNodePlotter
+    return !!range && range.start && range.end
+  })
+
 export const readFileForTokenProvider = (filePath: string): WollokNodePlotter[] => {
   const parsedFile = parse.File(filePath)
   const docText = readFileSync(filePath, { encoding: 'utf-8' })
   const parsedPackage = parsedFile.tryParse(docText)
   const splittedLines = docText.split('\n')
-  return excludeNullish(processCode(parsedPackage.members[0], splittedLines)).concat(processComments(splittedLines))
+  const processed = excludeNullish(processCode(parsedPackage.members[0], splittedLines)).concat(processComments(splittedLines))
+  validateHighlighter(processed)
+  return processed
 }
 
 export const processedByTokenType = (processed: WollokNodePlotter[], tokenType: string): IterableIterator<WollokNodePlotter> => processed.filter(token => token.tokenType === tokenType).values()