diff --git a/mini-e2e-helm.groovy b/mini-e2e-helm.groovy
index ca3914eaf..f5ea50a75 100644
--- a/mini-e2e-helm.groovy
+++ b/mini-e2e-helm.groovy
@@ -24,14 +24,16 @@ node('cico-workspace') {
 	}
 
 	stage('skip ci/skip/e2e label') {
+		environment {
+			// "github-api-token" is a secret text credential configured in Jenkins
+			GITHUB_API_TOKEN = credentials("github-api-token")
+		}
+
 		if (params.ghprbPullId == null) {
 			skip_e2e = 1
 			return
 		}
 
-		// "github-api-token" is a secret text credential configured in Jenkins
-		env.GITHUB_API_TOKEN = credentials("github-api-token")
-
 		skip_e2e = sh(
 			script: "./scripts/get_github_labels.py --id=${ghprbPullId} --has-label=ci/skip/e2e",
 			returnStatus: true)
diff --git a/mini-e2e.groovy b/mini-e2e.groovy
index d4fc56a6a..ee7816436 100644
--- a/mini-e2e.groovy
+++ b/mini-e2e.groovy
@@ -21,14 +21,16 @@ node('cico-workspace') {
 	}
 
 	stage('skip ci/skip/e2e label') {
+		environment {
+			// "github-api-token" is a secret text credential configured in Jenkins
+			GITHUB_API_TOKEN = credentials("github-api-token")
+		}
+
 		if (params.ghprbPullId == null) {
 			skip_e2e = 1
 			return
 		}
 
-		// "github-api-token" is a secret text credential configured in Jenkins
-		env.GITHUB_API_TOKEN = credentials("github-api-token")
-
 		skip_e2e = sh(
 			script: "./scripts/get_github_labels.py --id=${ghprbPullId} --has-label=ci/skip/e2e",
 			returnStatus: true)
diff --git a/upgrade-tests.groovy b/upgrade-tests.groovy
index ad814cad1..37a8072af 100644
--- a/upgrade-tests.groovy
+++ b/upgrade-tests.groovy
@@ -21,14 +21,16 @@ node('cico-workspace') {
 	}
 
 	stage('skip ci/skip/e2e label') {
+		environment {
+			// "github-api-token" is a secret text credential configured in Jenkins
+			GITHUB_API_TOKEN = credentials("github-api-token")
+		}
+
 		if (params.ghprbPullId == null) {
 			skip_e2e = 1
 			return
 		}
 
-		// "github-api-token" is a secret text credential configured in Jenkins
-		env.GITHUB_API_TOKEN = credentials("github-api-token")
-
 		skip_e2e = sh(
 			script: "./scripts/get_github_labels.py --id=${ghprbPullId} --has-label=ci/skip/e2e",
 			returnStatus: true)