diff --git a/tests/cases/fourslash/overloadOnConstCallSignature.ts b/tests/cases/fourslash/overloadOnConstCallSignature.ts
index d729fd4da6f..101d7750e04 100644
--- a/tests/cases/fourslash/overloadOnConstCallSignature.ts
+++ b/tests/cases/fourslash/overloadOnConstCallSignature.ts
@@ -11,7 +11,7 @@
 
 goTo.marker('1');
 verify.signatureHelpCountIs(4);
-verify.currentSignatureHelpIs('foo(name: \'order\'): string');
+verify.currentSignatureHelpIs('foo(name: "order"): string');
 edit.insert('"hi"');
 
 goTo.marker('2');
diff --git a/tests/cases/fourslash/quickInfoForOverloadOnConst1.ts b/tests/cases/fourslash/quickInfoForOverloadOnConst1.ts
index f2ee37aa675..948c2fde999 100644
--- a/tests/cases/fourslash/quickInfoForOverloadOnConst1.ts
+++ b/tests/cases/fourslash/quickInfoForOverloadOnConst1.ts
@@ -20,22 +20,22 @@
 ////c.x1(1, (x/*10*/x) => { return 1; } );
 
 goTo.marker('1');
-verify.quickInfoIs("(method) I.x1(a: number, callback: (x: 'hi') => number): any");
+verify.quickInfoIs("(method) I.x1(a: number, callback: (x: \"hi\") => number): any");
 goTo.marker('2');
-verify.quickInfoIs("(method) C.x1(a: number, callback: (x: 'hi') => number): any");
+verify.quickInfoIs("(method) C.x1(a: number, callback: (x: \"hi\") => number): any");
 goTo.marker('3');
-verify.quickInfoIs("(parameter) callback: (x: 'hi') => number");
+verify.quickInfoIs("(parameter) callback: (x: \"hi\") => number");
 goTo.marker('4');
-verify.quickInfoIs("(method) C.x1(a: number, callback: (x: 'hi') => number): any");
+verify.quickInfoIs("(method) C.x1(a: number, callback: (x: \"hi\") => number): any");
 goTo.marker('5');
 verify.quickInfoIs('(parameter) callback: (x: string) => number');
 goTo.marker('6');
 verify.quickInfoIs('(parameter) callback: (x: string) => number');
 goTo.marker('7');
-verify.quickInfoIs("(method) C.x1(a: number, callback: (x: 'hi') => number): any");
+verify.quickInfoIs("(method) C.x1(a: number, callback: (x: \"hi\") => number): any");
 goTo.marker('8');
-verify.quickInfoIs("(parameter) xx: 'hi'");
+verify.quickInfoIs("(parameter) xx: \"hi\"");
 goTo.marker('9');
-verify.quickInfoIs("(parameter) xx: 'bye'");
+verify.quickInfoIs("(parameter) xx: \"bye\"");
 goTo.marker('10');
-verify.quickInfoIs("(parameter) xx: 'hi'");
\ No newline at end of file
+verify.quickInfoIs("(parameter) xx: \"hi\"");
\ No newline at end of file
diff --git a/tests/cases/fourslash/signatureHelpOnOverloadOnConst.ts b/tests/cases/fourslash/signatureHelpOnOverloadOnConst.ts
index 8edd0617d70..e312b71aebe 100644
--- a/tests/cases/fourslash/signatureHelpOnOverloadOnConst.ts
+++ b/tests/cases/fourslash/signatureHelpOnOverloadOnConst.ts
@@ -18,9 +18,9 @@ verify.currentParameterSpanIs("z: string");
 goTo.marker('2');
 verify.signatureHelpCountIs(3);
 verify.currentParameterHelpArgumentNameIs("x");
-verify.currentParameterSpanIs("x: 'hi'");
+verify.currentParameterSpanIs("x: \"hi\"");
 
 goTo.marker('3');
 verify.signatureHelpCountIs(3);
 verify.currentParameterHelpArgumentNameIs("y");
-verify.currentParameterSpanIs("y: 'bye'");
+verify.currentParameterSpanIs("y: \"bye\"");