diff --git a/src/PrismicToolbar.tsx b/src/PrismicToolbar.tsx
index 6d66426..0f07056 100644
--- a/src/PrismicToolbar.tsx
+++ b/src/PrismicToolbar.tsx
@@ -43,6 +43,19 @@ export const PrismicToolbar = ({
 			script.dataset.repositoryName = repositoryName;
 			script.dataset.type = type;
 
+			// Disable Happy DOM `<script>` evaluation during
+			// tests.
+			//
+			// This is a patch ONLY INCLUDED DURING TESTS. It will
+			// be pruned during code minification in non-test
+			// environments.
+			//
+			// @see https://github.com/capricorn86/happy-dom/blob/02ae081e36f990c06171eda44f9d885fd9413d73/packages/happy-dom/src/nodes/html-script-element/HTMLScriptElement.ts#L191-L209
+			if (process.env.NODE_ENV === "test") {
+				// @ts-expect-error - `_evaluateScript` is a Happy DOM-specific property.
+				script._evaluateScript = false;
+			}
+
 			document.body.appendChild(script);
 		}
 	}, [repositoryName, type, src]);
diff --git a/test/PrismicToolbar.test.tsx b/test/PrismicToolbar.test.tsx
index c4b750a..9a003da 100644
--- a/test/PrismicToolbar.test.tsx
+++ b/test/PrismicToolbar.test.tsx
@@ -79,3 +79,21 @@ test('uses the legacy toolbar if type is set to "legacy"', (t) => {
 		t.fail("The toolbar script element was not found");
 	}
 });
+
+test("includes a Happy DOM patch to not execute scripts in test environments", (t) => {
+	const repositoryName = md5(t.title);
+
+	renderJSON(<PrismicToolbar repositoryName={repositoryName} type="legacy" />);
+
+	const script = getToolbarScript(repositoryName);
+
+	if (script instanceof HTMLScriptElement) {
+		t.is(
+			// @ts-expect-error - `_evaluateScript` is a Happy DOM-specific property.
+			script._evaluateScript,
+			false,
+		);
+	} else {
+		t.fail("The toolbar script element was not found");
+	}
+});