diff --git a/test/config/crl-updater.json b/test/config/crl-updater.json
index 5c9e12413..5cc6d4716 100644
--- a/test/config/crl-updater.json
+++ b/test/config/crl-updater.json
@@ -36,18 +36,13 @@
 			"hostOverride": "crl-storer.boulder"
 		},
 		"issuerCerts": [
-			"test/certs/webpki/int-rsa-a.cert.pem",
-			"test/certs/webpki/int-rsa-b.cert.pem",
-			"test/certs/webpki/int-rsa-c.cert.pem",
-			"test/certs/webpki/int-ecdsa-a.cert.pem",
-			"test/certs/webpki/int-ecdsa-b.cert.pem",
-			"test/certs/webpki/int-ecdsa-c.cert.pem"
+			"test/certs/webpki/int-rsa-a.cert.pem"
 		],
-		"numShards": 10,
-		"shardWidth": "240h",
-		"lookbackPeriod": "24h",
-		"updatePeriod": "10m",
-		"updateTimeout": "1m",
+		"numShards": 1,
+		"shardWidth": "24h",
+		"lookbackPeriod": "96h",
+		"updatePeriod": "24h",
+		"updateTimeout": "2m",
 		"expiresMargin": "5m",
 		"cacheControl": "stale-if-error=60",
 		"maxParallelism": 10,
