diff --git a/src/harness/fourslashImpl.ts b/src/harness/fourslashImpl.ts
index 9cc6641526819..b3bab59ad1c82 100644
--- a/src/harness/fourslashImpl.ts
+++ b/src/harness/fourslashImpl.ts
@@ -2564,7 +2564,7 @@ namespace FourSlash {
                 const identifier = this.classificationToIdentifier(a.classificationType as number);
                 const text = this.activeFile.content.slice(a.textSpan.start, a.textSpan.start + a.textSpan.length);
                 replacement.push(`    c2.semanticToken("${identifier}", "${text}"), `);
-            });
+            };
             replacement.push(");");
 
             throw new Error("You need to change the source code of fourslash test to use replaceWithSemanticClassifications");
diff --git a/src/services/classifier2020.ts b/src/services/classifier2020.ts
index 2df3cf3e0a243..adbac20b3e7e6 100644
--- a/src/services/classifier2020.ts
+++ b/src/services/classifier2020.ts
@@ -3,19 +3,18 @@ namespace ts.classifier.modern {
 
     /** @internal */
     export const enum TokenEncodingConsts {
-
         typeOffset = 8,
         modifierMask = (1 << typeOffset) - 1
     }
 
     /** @internal */
     export const enum TokenType {
-        class, enum, interface, namespace, typeParameter, type, parameter, variable, enumMember, property, function, member, _
+        class, enum, interface, namespace, typeParameter, type, parameter, variable, enumMember, property, function, member
     }
 
     /** @internal */
     export const enum TokenModifier {
-        declaration, static, async, readonly, defaultLibrary, local, _
+        declaration, static, async, readonly, defaultLibrary, local
     }
 
     /** This is mainly used internally for testing */
@@ -26,10 +25,10 @@ namespace ts.classifier.modern {
         const dense = classifications.spans;
         const result: ClassifiedSpan[] = [];
         for (let i = 0; i < dense.length; i += 3) {
-                result.push({
-                        textSpan: createTextSpan(dense[i], dense[i + 1]),
-                        classificationType: dense[i + 2]
-                });
+            result.push({
+                textSpan: createTextSpan(dense[i], dense[i + 1]),
+                classificationType: dense[i + 2]
+            });
         }
 
         return result;
@@ -46,7 +45,7 @@ namespace ts.classifier.modern {
         const resultTokens: number[] = [];
 
         const collector = (node: Node, typeIdx: number, modifierSet: number) => {
-            resultTokens.push(node.getStart(), node.getWidth(), ((typeIdx + 1) << TokenEncodingConsts.typeOffset) + modifierSet);
+            resultTokens.push(node.getStart(sourceFile), node.getWidth(sourceFile), ((typeIdx + 1) << TokenEncodingConsts.typeOffset) + modifierSet);
         };
 
         if (program && sourceFile) {
diff --git a/src/services/services.ts b/src/services/services.ts
index f279a8be80490..fafe99387ec47 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -1802,11 +1802,11 @@ namespace ts {
             synchronizeHostData();
 
             const responseFormat = format || SemanticClassificationFormat.Original;
-            if (responseFormat === SemanticClassificationFormat.Original) {
-                return ts.getSemanticClassifications(program.getTypeChecker(), cancellationToken, getValidSourceFile(fileName), program.getClassifiableNames(), span);
+            if (responseFormat === SemanticClassificationFormat.TwentyTwenty) {
+                return classifier.modern.getSemanticClassifications(program, cancellationToken, getValidSourceFile(fileName), span);
             }
             else {
-                return classifier.modern.getSemanticClassifications(program, cancellationToken, getValidSourceFile(fileName), span);
+                return ts.getSemanticClassifications(program.getTypeChecker(), cancellationToken, getValidSourceFile(fileName), program.getClassifiableNames(), span);
             }
         }