diff --git a/tests/cases/fourslash/fourslash.ts b/tests/cases/fourslash/fourslash.ts
index e61154f2fd..83db54c50d 100644
--- a/tests/cases/fourslash/fourslash.ts
+++ b/tests/cases/fourslash/fourslash.ts
@@ -398,7 +398,7 @@ declare namespace FourSlashInterface {
         organizeImports(newContent: string): void;
 
         toggleLineComment(newFileContent: string): void;
-        toggleBlockComment(newFileContent: string): void;
+        toggleMultilineComment(newFileContent: string): void;
     }
     class edit {
         backspace(count?: number): void;
diff --git a/tests/cases/fourslash/toggleMultilineComment1.ts b/tests/cases/fourslash/toggleMultilineComment1.ts
index cfc0fe87af..d32e7b28ec 100644
--- a/tests/cases/fourslash/toggleMultilineComment1.ts
+++ b/tests/cases/fourslash/toggleMultilineComment1.ts
@@ -1,4 +1,4 @@
-// Simple block comment and uncomment.
+// Simple multiline comment and uncomment.
 
 //// let var1[| = 1;
 //// let var2 = 2;
@@ -12,7 +12,7 @@
 //// let var8 = 2;
 //// let var9 = 3;*/|]
 
-verify.toggleBlockComment(
+verify.toggleMultilineComment(
     `let var1/* = 1;
 let var2 = 2;
 let var3 */= 3;
diff --git a/tests/cases/fourslash/toggleMultilineComment2.ts b/tests/cases/fourslash/toggleMultilineComment2.ts
index 62dc1f45e6..926d29e2d2 100644
--- a/tests/cases/fourslash/toggleMultilineComment2.ts
+++ b/tests/cases/fourslash/toggleMultilineComment2.ts
@@ -17,7 +17,7 @@
 //// let var11 = 2;
 //// /*let var12|] = 3;*/
 
-verify.toggleBlockComment(
+verify.toggleMultilineComment(
     `let var1/* = 1;
 let var2 *//*= 2;
 let var3 *//*= 3;*/
diff --git a/tests/cases/fourslash/toggleMultilineComment3.ts b/tests/cases/fourslash/toggleMultilineComment3.ts
index fab4263b3c..bcfa3418d9 100644
--- a/tests/cases/fourslash/toggleMultilineComment3.ts
+++ b/tests/cases/fourslash/toggleMultilineComment3.ts
@@ -1,6 +1,6 @@
 /// <reference path="fourslash.ts">
 
-// If range is inside a single line comment, just add the block comment.
+// If range is inside a single line comment, just add the multiline comment.
 
 //// // let va[|r1 = 1;
 //// let var2 = 2;
@@ -14,7 +14,7 @@
 //// let var8 = 2;
 //// // let var9|] = 3;
 
-verify.toggleBlockComment(
+verify.toggleMultilineComment(
     `/*// let var1 = 1;
 let var2 = 2;
 // let var3*/ = 3;
diff --git a/tests/cases/fourslash/toggleMultilineComment5.ts b/tests/cases/fourslash/toggleMultilineComment5.ts
index e806ef446b..e516b0b04f 100644
--- a/tests/cases/fourslash/toggleMultilineComment5.ts
+++ b/tests/cases/fourslash/toggleMultilineComment5.ts
@@ -15,7 +15,7 @@
 //// </MyContainer>;
 //// const e = <MyComponent>[|{'foo'}|]</MyComponent>;
 
-verify.toggleBlockComment(
+verify.toggleMultilineComment(
     `const a = <div tabIndex="0">{/*</div>;*/}
 const b = <div>This is {/*valid HTML &amp;*/} JSX at the same time.</div>;
 const c = <MyContainer>
diff --git a/tests/cases/fourslash/toggleMultilineComment6.ts b/tests/cases/fourslash/toggleMultilineComment6.ts
index 882fbbffb0..caa60504fd 100644
--- a/tests/cases/fourslash/toggleMultilineComment6.ts
+++ b/tests/cases/fourslash/toggleMultilineComment6.ts
@@ -1,6 +1,6 @@
 // Jsx uses multiline comments for each line commented.
 
-// Selection is outside of a block comments inserts block comments instead of removing.
+// Selection is outside of a multiline comments inserts multiline comments instead of removing.
 // There's some variations between jsx and js comments depending on the position.
 
 //@Filename: file.tsx