diff --git a/changelog/pvl-spectest-size.md b/changelog/pvl-spectest-size.md
new file mode 100644
index 0000000000..de28e6b473
--- /dev/null
+++ b/changelog/pvl-spectest-size.md
@@ -0,0 +1,3 @@
+### Ignored
+
+- CI: Changed test size for //testing/spectest/mainnet:go_default_test
diff --git a/testing/spectest/mainnet/BUILD.bazel b/testing/spectest/mainnet/BUILD.bazel
index 3f1a748cf0..66af0d466c 100644
--- a/testing/spectest/mainnet/BUILD.bazel
+++ b/testing/spectest/mainnet/BUILD.bazel
@@ -2,6 +2,7 @@ load("@prysm//tools/go:def.bzl", "go_test")
 
 go_test(
     name = "go_default_test",
+    size = "large",
     srcs = [
         "altair__epoch_processing__effective_balance_updates_test.go",
         "altair__epoch_processing__eth1_data_reset_test.go",