diff --git a/.changeset/jolly-rules-train.md b/.changeset/jolly-rules-train.md
new file mode 100644
index 000000000..eb56bc90e
--- /dev/null
+++ b/.changeset/jolly-rules-train.md
@@ -0,0 +1,5 @@
+---
+"@flint.fyi/core": patch
+---
+
+Speed up teardowns.
diff --git a/packages/core/src/running/runConfig.ts b/packages/core/src/running/runConfig.ts
index 33df1390e..1b6c236fa 100644
--- a/packages/core/src/running/runConfig.ts
+++ b/packages/core/src/running/runConfig.ts
@@ -90,9 +90,14 @@ async function runRules(
 ) {
 	const reportsByFilePath = new CachedFactory<string, FileReport[]>(() => []);
 
+	const promises = [];
 	for (const [rule, filesAndOptions] of rulesFilesAndOptionsByRule) {
-		const ruleReportsByFilePath = await runLintRule(rule, filesAndOptions);
+		const ruleReportsByFilePath = runLintRule(rule, filesAndOptions);
 
+		promises.push(ruleReportsByFilePath);
+	}
+	const rulesResults = await Promise.all(promises);
+	for (const ruleReportsByFilePath of rulesResults) {
 		for (const [filePath, ruleReports] of ruleReportsByFilePath) {
 			reportsByFilePath.get(filePath).push(...ruleReports);
 		}