diff --git a/ca/testdata/ca.json b/ca/testdata/ca.json
index d40325e8..2a336f24 100644
--- a/ca/testdata/ca.json
+++ b/ca/testdata/ca.json
@@ -6,7 +6,7 @@
     "password": "password",
     "address": "127.0.0.1:0",
     "dnsNames": ["127.0.0.1"],
-    "logger": {"format": "text"},
+    "_logger": {"format": "text"},
     "tls": {
         "minVersion": 1.2,
         "maxVersion": 1.3,
diff --git a/ca/testdata/federated-ca.json b/ca/testdata/federated-ca.json
index 342adfcf..0b1c6c8d 100644
--- a/ca/testdata/federated-ca.json
+++ b/ca/testdata/federated-ca.json
@@ -6,7 +6,7 @@
     "password": "asdf",
     "address": "127.0.0.1:0",
     "dnsNames": ["127.0.0.1"],
-    "logger": {"format": "text"},
+    "_logger": {"format": "text"},
     "tls": {
         "minVersion": 1.2,
         "maxVersion": 1.2,
diff --git a/ca/testdata/rotate-ca-0.json b/ca/testdata/rotate-ca-0.json
index 20dd603a..aa9353ed 100644
--- a/ca/testdata/rotate-ca-0.json
+++ b/ca/testdata/rotate-ca-0.json
@@ -5,7 +5,7 @@
     "password": "password",
     "address": "127.0.0.1:0",
     "dnsNames": ["127.0.0.1"],
-    "logger": {"format": "text"},
+    "_logger": {"format": "text"},
     "tls": {
         "minVersion": 1.2,
         "maxVersion": 1.2,
diff --git a/ca/testdata/rotate-ca-1.json b/ca/testdata/rotate-ca-1.json
index b038f694..c78ba035 100644
--- a/ca/testdata/rotate-ca-1.json
+++ b/ca/testdata/rotate-ca-1.json
@@ -5,7 +5,7 @@
     "password": "password",
     "address": "127.0.0.1:0",
     "dnsNames": ["127.0.0.1"],
-    "logger": {"format": "text"},
+    "_logger": {"format": "text"},
     "tls": {
         "minVersion": 1.2,
         "maxVersion": 1.2,
diff --git a/ca/testdata/rotate-ca-2.json b/ca/testdata/rotate-ca-2.json
index 7ec965d0..2db1c992 100644
--- a/ca/testdata/rotate-ca-2.json
+++ b/ca/testdata/rotate-ca-2.json
@@ -5,7 +5,7 @@
     "password": "asdf",
     "address": "127.0.0.1:0",
     "dnsNames": ["127.0.0.1"],
-    "logger": {"format": "text"},
+    "_logger": {"format": "text"},
     "tls": {
         "minVersion": 1.2,
         "maxVersion": 1.2,
diff --git a/ca/testdata/rotate-ca-3.json b/ca/testdata/rotate-ca-3.json
index 968da6ba..50f4a118 100644
--- a/ca/testdata/rotate-ca-3.json
+++ b/ca/testdata/rotate-ca-3.json
@@ -5,7 +5,7 @@
     "password": "asdf",
     "address": "127.0.0.1:0",
     "dnsNames": ["127.0.0.1"],
-    "logger": {"format": "text"},
+    "_logger": {"format": "text"},
     "tls": {
         "minVersion": 1.2,
         "maxVersion": 1.2,