diff --git a/tests/markdown/variables.test.js b/tests/markdown/variables.test.js
index e6018e19f..3a03d64f6 100644
--- a/tests/markdown/variables.test.js
+++ b/tests/markdown/variables.test.js
@@ -370,4 +370,18 @@ describe('Cross-page variables', ()=>{
 		const rendered = renderAllPages([source0, source1]).join('\n\\page\n').trimReturns();
 		expect(rendered, `Input:\n${[source0, source1].join('\n\\page\n')}`, { showPrefix: false }).toBe('<p>two</p><p>one</p>\\page<p>two</p>');
 	});
+});
+
+describe('Variable name as a subset of a function or other variable name', ()=>{
+	it('Variable name as a subset of a function', function() {
+		const source = `[a]: -1\n\n$[abs(a)]`;
+		const rendered = Markdown.render(source).trimReturns();
+		expect(rendered).toBe('<p>1</p>');
+	});
+
+	it('Variable name as a subset of another variable name', function() {
+		const source = `[ab]: 2\n\n[aba]: 8\n\n[ba]: 4\n\n$[ab + aba + ba]`;
+		const rendered = Markdown.render(source).trimReturns();
+		expect(rendered).toBe('<p>14</p>');
+	});
 });
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