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diff --git a/installed-tests/js/testImporter2.js b/installed-tests/js/testImporter2.js
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+// SPDX-License-Identifier: MIT OR LGPL-2.0-or-later
+// SPDX-FileCopyrightText: 2023 Philip Chimento <philip.chimento@gmail.com>
+
+// This test is in a separate file instead of testImporter.js, because it tests
+// loading overrides for g-i modules, and in the original file we have literally
+// run out of g-i modules to override -- at least, the ones that we can assume
+// will be present on any system where GJS is compiled.
+
+describe('GI importer', function () {
+    describe('on failure', function () {
+        // For these tests, we provide special overrides files to sabotage the
+        // import, at the path resource:///org/gjs/jsunit/modules/badOverrides2.
+        let oldSearchPath;
+        beforeAll(function () {
+            oldSearchPath = imports.overrides.searchPath.slice();
+            imports.overrides.searchPath = ['resource:///org/gjs/jsunit/modules/badOverrides2'];
+        });
+
+        afterAll(function () {
+            imports.overrides.searchPath = oldSearchPath;
+        });
+
+        it("throws an exception when the overrides _init isn't a function", function () {
+            expect(() => imports.gi.GIMarshallingTests).toThrowError(/_init/);
+        });
+
+        it('throws an exception when the overrides _init is null', function () {
+            expect(() => imports.gi.Gio).toThrowError(/_init/);
+        });
+
+        it('throws an exception when the overrides _init is undefined', function () {
+            expect(() => imports.gi.Regress).toThrowError(/_init/);
+        });
+
+        it('throws an exception when the overrides _init is missing', function () {
+            expect(() => imports.gi.WarnLib).toThrowError(/_init/);
+        });
+    });
+});