diff --git a/lib/rule-tester/rule-tester.js b/lib/rule-tester/rule-tester.js
index 4b8c38692b0..2ac26534fcc 100644
--- a/lib/rule-tester/rule-tester.js
+++ b/lib/rule-tester/rule-tester.js
@@ -174,7 +174,7 @@ function freezeDeeply(x) {
  */
 function sanitize(text) {
     return text.replace(
-        /[\u0000-\u0009|\u000b-\u001a]/gu, // eslint-disable-line no-control-regex
+        /[\u0000-\u0009\u000b-\u001a]/gu, // eslint-disable-line no-control-regex
         c => `\\u${c.codePointAt(0).toString(16).padStart(4, "0")}`
     );
 }
diff --git a/tests/lib/rule-tester/rule-tester.js b/tests/lib/rule-tester/rule-tester.js
index 4abb053abd4..7f2b6de67f0 100644
--- a/tests/lib/rule-tester/rule-tester.js
+++ b/tests/lib/rule-tester/rule-tester.js
@@ -1281,6 +1281,20 @@ describe("RuleTester", () => {
             });
             sinon.assert.calledWith(spyRuleTesterIt, "\\u0000");
         });
+        it("should present the pipe character correctly", () => {
+            const code = "var foo = bar || baz;";
+
+            ruleTester.run("no-var", require("../../fixtures/testers/rule-tester/no-var"), {
+                valid: [],
+                invalid: [
+                    {
+                        code,
+                        errors: [/^Bad var/u]
+                    }
+                ]
+            });
+            sinon.assert.calledWith(spyRuleTesterIt, code);
+        });
 
     });
 });