diff --git a/lib/jasmine-core/jasmine.js b/lib/jasmine-core/jasmine.js
index 89d36cfc..2c4204fb 100644
--- a/lib/jasmine-core/jasmine.js
+++ b/lib/jasmine-core/jasmine.js
@@ -43,6 +43,9 @@ var getJasmineRequireObj = (function() {
     return jasmineRequire;
   }
 
+  const loadedAsBrowserEsm =
+    globalThis.document && !globalThis.document.currentScript;
+
   getJasmineRequire().core = function(jRequire) {
     const j$ = {};
     Object.defineProperty(j$, 'private', {
@@ -124,8 +127,7 @@ var getJasmineRequireObj = (function() {
     j$.private.matchers = jRequire.requireMatchers(jRequire, j$);
     j$.private.asyncMatchers = jRequire.requireAsyncMatchers(jRequire, j$);
 
-    j$.private.loadedAsBrowserEsm =
-      globalThis.document && !globalThis.document.currentScript;
+    j$.private.loadedAsBrowserEsm = loadedAsBrowserEsm;
 
     j$.private.deprecateMonkeyPatching(j$, [
       // These are meant to be set by users.
diff --git a/src/core/requireCore.js b/src/core/requireCore.js
index e8b70c20..70b08ef6 100644
--- a/src/core/requireCore.js
+++ b/src/core/requireCore.js
@@ -19,6 +19,9 @@ var getJasmineRequireObj = (function() {
     return jasmineRequire;
   }
 
+  const loadedAsBrowserEsm =
+    globalThis.document && !globalThis.document.currentScript;
+
   getJasmineRequire().core = function(jRequire) {
     const j$ = {};
     Object.defineProperty(j$, 'private', {
@@ -100,8 +103,7 @@ var getJasmineRequireObj = (function() {
     j$.private.matchers = jRequire.requireMatchers(jRequire, j$);
     j$.private.asyncMatchers = jRequire.requireAsyncMatchers(jRequire, j$);
 
-    j$.private.loadedAsBrowserEsm =
-      globalThis.document && !globalThis.document.currentScript;
+    j$.private.loadedAsBrowserEsm = loadedAsBrowserEsm;
 
     j$.private.deprecateMonkeyPatching(j$, [
       // These are meant to be set by users.