fix: test failure

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
report:
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    status: passed
  - task: lint_editorconfig
    status: passed
  - task: lint_markdown
    status: na
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    status: na
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    status: na
  - task: lint_javascript_src
    status: na
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    status: na
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    status: na
  - task: lint_javascript_tests
    status: passed
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    status: na
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    status: na
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    status: na
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    status: na
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    status: na
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    status: na
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    status: passed
  - task: lint_typescript_tests
    status: na
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    status: passed
---

Author: Sachinn-64

lib/node_modules/@stdlib/plot/vega/title/ctor/test/test.js

@@ -380,6 +380,8 @@ tape( 'the constructor throws an error if provided an invalid `fontStyle` option
 	var i;
 
 	values = [
+		'Arial',
+		'foo',
 		5,
 		NaN,
 		null,
@@ -408,6 +410,9 @@ tape( 'the constructor throws an error if provided an invalid `fontWeight` optio
 	var i;
 
 	values = [
+		'foo',
+		6,
+		NaN,
 		null,
 		true,
 		false,
@@ -903,7 +908,7 @@ tape( 'the constructor returns an instance having a `toJSON` method for serializ
 		},
 		'font': 'Arial',
 		'fontSize': 12,
-		'fontStyle': 'Arial',
+		'fontStyle': 'italic',
 		'fontWeight': 'bold',
 		'frame': 'group',
 		'limit': 100,
@@ -942,7 +947,7 @@ tape( 'the constructor returns an instance having a `toJSON` method for serializ
 		},
 		'font': 'Arial',
 		'fontSize': 12,
-		'fontStyle': 'Arial',
+		'fontStyle': 'italic',
 		'fontWeight': 'bold',
 		'frame': 'group',
 		'limit': 100,