diff --git a/lib/javascript/JavascriptParser.js b/lib/javascript/JavascriptParser.js
index 3800822ee8e..0f3b80010a4 100644
--- a/lib/javascript/JavascriptParser.js
+++ b/lib/javascript/JavascriptParser.js
@@ -545,11 +545,13 @@ class JavascriptParser extends Parser {
 					const rightSuffix = getSuffix(right.parts);
 					const lenPrefix = Math.min(leftPrefix.length, rightPrefix.length);
 					const lenSuffix = Math.min(leftSuffix.length, rightSuffix.length);
-					if (
-						leftPrefix.slice(0, lenPrefix) !==
-							rightPrefix.slice(0, lenPrefix) ||
-						leftSuffix.slice(-lenSuffix) !== rightSuffix.slice(-lenSuffix)
-					) {
+					const prefixMismatch =
+						lenPrefix > 0 &&
+						leftPrefix.slice(0, lenPrefix) !== rightPrefix.slice(0, lenPrefix);
+					const suffixMismatch =
+						lenSuffix > 0 &&
+						leftSuffix.slice(-lenSuffix) !== rightSuffix.slice(-lenSuffix);
+					if (prefixMismatch || suffixMismatch) {
 						return res
 							.setBoolean(!eql)
 							.setSideEffects(
diff --git a/test/JavascriptParser.unittest.js b/test/JavascriptParser.unittest.js
index 0e7ebd94b3a..cc916821f7d 100644
--- a/test/JavascriptParser.unittest.js
+++ b/test/JavascriptParser.unittest.js
@@ -541,6 +541,14 @@ describe("JavascriptParser", () => {
 			"`start${'str'}mid${obj2}end`":
 				// eslint-disable-next-line no-template-curly-in-string
 				"template=[start${'str'}mid string=startstrmid],[end string=end]",
+			// eslint-disable-next-line no-template-curly-in-string
+			"`a${x}` === `b${x}`": "bool=false",
+			// eslint-disable-next-line no-template-curly-in-string
+			"`${x}a` === `${x}b`": "bool=false",
+			// eslint-disable-next-line no-template-curly-in-string
+			"`${a}${b}` === `a${b}`": "",
+			// eslint-disable-next-line no-template-curly-in-string
+			"`${a}${b}` === `${a}b`": "",
 			"'abc'.slice(1)": "string=bc",
 			"'abcdef'.slice(2, 5)": "string=cde",
 			"'abcdef'.substring(2, 3)": "string=c",