diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index cc5cd68a90..7fea04de4b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -145,7 +145,7 @@ jobs:
         if: matrix.test-mode == 'defaults'
         run: |
           packages=`go list ./...`
-          stdbuf -oL gotestsum --format short-verbose --packages="$packages" --rerun-fails=1 --no-color=false -- ./... -coverprofile=coverage.txt -covermode=atomic -coverpkg=./...,./go-ethereum/... -timeout 20m -parallel=8 > >(stdbuf -oL tee full.log | grep -vE "INFO|seal")
+          stdbuf -oL gotestsum --format short-verbose --packages="$packages" --rerun-fails=1 --no-color=false -- ./... -coverprofile=coverage.txt -covermode=atomic -coverpkg=./...,./go-ethereum/... -timeout 20m -parallel=8 -tags=cionly > >(stdbuf -oL tee full.log | grep -vE "INFO|seal")
 
       - name: run tests with race detection
         if: matrix.test-mode == 'race'
diff --git a/system_tests/fees_test.go b/system_tests/fees_test.go
index 4d8fbf43fd..ccca82e009 100644
--- a/system_tests/fees_test.go
+++ b/system_tests/fees_test.go
@@ -2,8 +2,10 @@
 // For license information, see https://github.com/nitro/blob/master/LICENSE
 
 // these tests seems to consume too much memory with race detection
-//go:build !race
-// +build !race
+// Test randomly fails with L1 gas price estimate should tend toward the basefee
+// so skipping locally, but running on CI
+//go:build !race && cionly
+// +build !race,cionly
 
 package arbtest
 
diff --git a/validator/server_arb/execution_run.go b/validator/server_arb/execution_run.go
index 8bdce145a2..d29a88d34d 100644
--- a/validator/server_arb/execution_run.go
+++ b/validator/server_arb/execution_run.go
@@ -24,7 +24,7 @@ type executionRun struct {
 	close sync.Once
 }
 
-// NewExecutionChallengeBackend creates a backend with the given arguments.
+// NewExecutionRun creates a backend with the given arguments.
 // Note: machineCache may be nil, but if present, it must not have a restricted range.
 func NewExecutionRun(
 	ctxIn context.Context,