diff --git a/bin/schedule b/bin/schedule
index 857ec9f6ff..6300d97edf 100644
--- a/bin/schedule
+++ b/bin/schedule
@@ -1,6 +1,6 @@
 #!/bin/sh
 
-if [ -z "$_APP_REDIS_USER" ] || [ -z "$_APP_REDIS_PASS" ]
+if [ -z "$_APP_REDIS_USER" ] && [ -z "$_APP_REDIS_PASS" ]
 then
     REDIS_BACKEND="${_APP_REDIS_HOST}:${_APP_REDIS_PORT}"
 else
diff --git a/bin/worker-audits b/bin/worker-audits
index e411aa386f..8e99481d25 100644
--- a/bin/worker-audits
+++ b/bin/worker-audits
@@ -1,6 +1,6 @@
 #!/bin/sh
 
-if [ -z "$_APP_REDIS_USER" ] || [ -z "$_APP_REDIS_PASS" ]
+if [ -z "$_APP_REDIS_USER" ] && [ -z "$_APP_REDIS_PASS" ]
 then
     REDIS_BACKEND="${_APP_REDIS_HOST}:${_APP_REDIS_PORT}"
 else
diff --git a/bin/worker-certificates b/bin/worker-certificates
index 7d474e1ead..9214af513d 100755
--- a/bin/worker-certificates
+++ b/bin/worker-certificates
@@ -1,6 +1,6 @@
 #!/bin/sh
 
-if [ -z "$_APP_REDIS_USER" ] || [ -z "$_APP_REDIS_PASS" ]
+if [ -z "$_APP_REDIS_USER" ] && [ -z "$_APP_REDIS_PASS" ]
 then
     REDIS_BACKEND="${_APP_REDIS_HOST}:${_APP_REDIS_PORT}"
 else
diff --git a/bin/worker-deletes b/bin/worker-deletes
index 9c2fb3118e..517f755304 100644
--- a/bin/worker-deletes
+++ b/bin/worker-deletes
@@ -1,6 +1,6 @@
 #!/bin/sh
 
-if [ -z "$_APP_REDIS_USER" ] || [ -z "$_APP_REDIS_PASS" ]
+if [ -z "$_APP_REDIS_USER" ] && [ -z "$_APP_REDIS_PASS" ]
 then
     REDIS_BACKEND="${_APP_REDIS_HOST}:${_APP_REDIS_PORT}"
 else
diff --git a/bin/worker-functions b/bin/worker-functions
index b41c019942..29cd4b85cb 100644
--- a/bin/worker-functions
+++ b/bin/worker-functions
@@ -1,6 +1,6 @@
 #!/bin/sh
 
-if [ -z "$_APP_REDIS_USER" ] || [ -z "$_APP_REDIS_PASS" ]
+if [ -z "$_APP_REDIS_USER" ] && [ -z "$_APP_REDIS_PASS" ]
 then
     REDIS_BACKEND="${_APP_REDIS_HOST}:${_APP_REDIS_PORT}"
 else
diff --git a/bin/worker-mails b/bin/worker-mails
index 64d10f6099..a663942624 100644
--- a/bin/worker-mails
+++ b/bin/worker-mails
@@ -1,6 +1,6 @@
 #!/bin/sh
 
-if [ -z "$_APP_REDIS_USER" ] || [ -z "$_APP_REDIS_PASS" ]
+if [ -z "$_APP_REDIS_USER" ] && [ -z "$_APP_REDIS_PASS" ]
 then
     REDIS_BACKEND="${_APP_REDIS_HOST}:${_APP_REDIS_PORT}"
 else
diff --git a/bin/worker-tasks b/bin/worker-tasks
index fc395b34ab..bac1f54a83 100644
--- a/bin/worker-tasks
+++ b/bin/worker-tasks
@@ -1,6 +1,6 @@
 #!/bin/sh
 
-if [ -z "$_APP_REDIS_USER" ] || [ -z "$_APP_REDIS_PASS" ]
+if [ -z "$_APP_REDIS_USER" ] && [ -z "$_APP_REDIS_PASS" ]
 then
     REDIS_BACKEND="${_APP_REDIS_HOST}:${_APP_REDIS_PORT}"
 else
diff --git a/bin/worker-usage b/bin/worker-usage
index 4176f54b86..9cb9b5ed86 100644
--- a/bin/worker-usage
+++ b/bin/worker-usage
@@ -1,6 +1,6 @@
 #!/bin/sh
 
-if [ -z "$_APP_REDIS_USER" ] || [ -z "$_APP_REDIS_PASS" ]
+if [ -z "$_APP_REDIS_USER" ] && [ -z "$_APP_REDIS_PASS" ]
 then
     REDIS_BACKEND="${_APP_REDIS_HOST}:${_APP_REDIS_PORT}"
 else
diff --git a/bin/worker-webhooks b/bin/worker-webhooks
index 13029ecbd9..4ae2fadaa9 100644
--- a/bin/worker-webhooks
+++ b/bin/worker-webhooks
@@ -1,6 +1,6 @@
 #!/bin/sh
 
-if [ -z "$_APP_REDIS_USER" ] || [ -z "$_APP_REDIS_PASS" ]
+if [ -z "$_APP_REDIS_USER" ] && [ -z "$_APP_REDIS_PASS" ]
 then
     REDIS_BACKEND="${_APP_REDIS_HOST}:${_APP_REDIS_PORT}"
 else