diff --git a/lib/internal/source_map/source_map_cache.js b/lib/internal/source_map/source_map_cache.js
index 603685290ad85f..c930abee2aec81 100644
--- a/lib/internal/source_map/source_map_cache.js
+++ b/lib/internal/source_map/source_map_cache.js
@@ -5,9 +5,12 @@ const {
   JSONParse,
   ObjectFreeze,
   RegExpPrototypeExec,
+  RegExpPrototypeSymbolMatch,
   SafeMap,
   StringPrototypeCodePointAt,
+  StringPrototypeIndexOf,
   StringPrototypeSplit,
+  StringPrototypeSubstring,
 } = primordials;
 
 // See https://tc39.es/ecma426/ for SourceMap V3 specification.
@@ -37,8 +40,8 @@ const getModuleSourceMapCache = getLazy(() => {
 // source url magic comments.
 const generatedSourceMapCache = new SafeMap();
 const kLeadingProtocol = /^\w+:\/\//;
-const kSourceMappingURLMagicComment = /\/[*/]#\s+sourceMappingURL=(?<sourceMappingURL>[^\s]+)/g;
-const kSourceURLMagicComment = /\/[*/]#\s+sourceURL=(?<sourceURL>[^\s]+)/g;
+const kSourceMappingURLMagicComment = /\/[*/]#\s+sourceMappingURL=[^\s]+/g;
+const kSourceURLMagicComment = /\/[*/]#\s+sourceURL=[^\s]+/g;
 
 const { isAbsolute } = require('path');
 const { fileURLToPath, pathToFileURL, URL, URLParse } = require('internal/url');
@@ -99,17 +102,12 @@ function setSourceMapsSupport(enabled, options = kEmptyObject) {
  * @returns {string | null} source url or null if not present
  */
 function extractSourceURLMagicComment(content) {
-  let match;
-  let matchSourceURL;
-  // A while loop is used here to get the last occurrence of sourceURL.
-  // This is needed so that we don't match sourceURL in string literals.
-  while ((match = RegExpPrototypeExec(kSourceURLMagicComment, content))) {
-    matchSourceURL = match;
-  }
-  if (matchSourceURL == null) {
+  const matches = RegExpPrototypeSymbolMatch(kSourceURLMagicComment, content);
+  if (matches == null || matches.length === 0) {
     return null;
   }
-  let sourceURL = matchSourceURL.groups.sourceURL;
+  const match = matches[matches.length - 1];
+  let sourceURL = StringPrototypeSubstring(match, StringPrototypeIndexOf(match, '=') + 1);
   if (sourceURL != null && RegExpPrototypeExec(kLeadingProtocol, sourceURL) === null) {
     sourceURL = pathToFileURL(sourceURL).href;
   }
@@ -125,17 +123,12 @@ function extractSourceURLMagicComment(content) {
  * @returns {string | null} source map url or null if not present
  */
 function extractSourceMapURLMagicComment(content) {
-  let match;
-  let lastMatch;
-  // A while loop is used here to get the last occurrence of sourceMappingURL.
-  // This is needed so that we don't match sourceMappingURL in string literals.
-  while ((match = RegExpPrototypeExec(kSourceMappingURLMagicComment, content))) {
-    lastMatch = match;
-  }
-  if (lastMatch == null) {
+  const matches = RegExpPrototypeSymbolMatch(kSourceMappingURLMagicComment, content);
+  if (matches == null || matches.length === 0) {
     return null;
   }
-  return lastMatch.groups.sourceMappingURL;
+  const match = matches[matches.length - 1];
+  return StringPrototypeSubstring(match, StringPrototypeIndexOf(match, '=') + 1);
 }
 
 /**
diff --git a/test/fixtures/source-map/output/source_map_eval.snapshot b/test/fixtures/source-map/output/source_map_eval.snapshot
index ff636e44063aa7..9446bc7e2666b4 100644
--- a/test/fixtures/source-map/output/source_map_eval.snapshot
+++ b/test/fixtures/source-map/output/source_map_eval.snapshot
@@ -1,10 +1,10 @@
-*/synthesized/workspace/tabs-source-url.coffee:26
+*/synthesized/workspace/tabs-source-url.coffee:32
 	alert "I knew it!"
 	^
 
 
 ReferenceError: alert is not defined
-    at Object.eval (*/synthesized/workspace/tabs-source-url.coffee:26:2)
+    at Object.eval (*/synthesized/workspace/tabs-source-url.coffee:32:2)
     at eval (*/synthesized/workspace/tabs-source-url.coffee:1:14)
     at Object.<anonymous> (*/test/fixtures/source-map/output/source_map_eval.js:11:1)
 
diff --git a/test/fixtures/source-map/tabs-source-url.coffee b/test/fixtures/source-map/tabs-source-url.coffee
index 7e73a605d32fc9..8127fb6dda61a3 100644
--- a/test/fixtures/source-map/tabs-source-url.coffee
+++ b/test/fixtures/source-map/tabs-source-url.coffee
@@ -21,6 +21,12 @@ math =
 race = (winner, runners...) ->
 	print winner, runners
 
+# Multiple sourceMappingURL comments
+## sourceMappingURL=data:application/json;base64,eyJ2ZXJzaW9uIjozLCJmaWxlIjoidGFicy1zb3VyY2UtdXJsLmpzIiwic
+
+# sourceMappingURL inside strings
+sourceMappingURL = "//# sourceMappingURL=data:application/json;base64,eyJ2ZXJzaW9uIjozLCJmaWxlIjoidGFicy1zb3VyY2UtdXJsLmpzIiwic"
+
 # Existence:
 if true
 	alert "I knew it!"
diff --git a/test/fixtures/source-map/tabs-source-url.js b/test/fixtures/source-map/tabs-source-url.js
index a4b43806a5f2f5..079f28d8c038ea 100644
--- a/test/fixtures/source-map/tabs-source-url.js
+++ b/test/fixtures/source-map/tabs-source-url.js
@@ -1,7 +1,7 @@
 // Generated by CoffeeScript 2.5.1
 (function() {
   // Assignment:
-  var cubes, list, math, num, number, opposite, race, square;
+  var cubes, list, math, num, number, opposite, race, sourceMappingURL, square;
 
   number = 42;
 
@@ -34,6 +34,12 @@
     return print(winner, runners);
   };
 
+  // Multiple sourceMappingURL comments
+  //# sourceMappingURL=data:application/json;base64,eyJ2ZXJzaW9uIjozLCJmaWxlIjoidGFicy1zb3VyY2UtdXJsLmpzIiwic
+
+  // sourceMappingURL inside strings
+  sourceMappingURL = "//# sourceMappingURL=data:application/json;base64,eyJ2ZXJzaW9uIjozLCJmaWxlIjoidGFicy1zb3VyY2UtdXJsLmpzIiwic";
+
   // Existence:
   if (true) {
     alert("I knew it!");
@@ -57,5 +63,5 @@
 
 }).call(this);
 
-//# sourceMappingURL=data:application/json;base64,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
+//# sourceMappingURL=data:application/json;base64,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
 //# sourceURL=./synthesized/workspace/tabs-source-url.coffee
\ No newline at end of file