diff --git a/packages/node_modules/@node-red/nodes/core/network/05-tls.js b/packages/node_modules/@node-red/nodes/core/network/05-tls.js
index c1b2c2105..5a3147af6 100644
--- a/packages/node_modules/@node-red/nodes/core/network/05-tls.js
+++ b/packages/node_modules/@node-red/nodes/core/network/05-tls.js
@@ -22,15 +22,16 @@ module.exports = function(RED) {
         RED.nodes.createNode(this,n);
         this.valid = true;
         this.verifyservercert = n.verifyservercert;
-        var certPath = n.cert.trim();
-        var keyPath = n.key.trim();
-        var caPath = n.ca.trim();
-        var p12Path = n.p12.trim();
+        var certPath, keyPath, caPath, p12Path;
+        if (n.cert) { certPath = n.cert.trim(); }
+        if (n.key) { keyPath = n.key.trim(); }
+        if (n.ca) { caPath = n.ca.trim(); }
+        if (n.p12) { p12Path = n.p12.trim(); }
         this.certType = n.certType || "files";
         this.servername = (n.servername||"").trim();
         this.alpnprotocol = (n.alpnprotocol||"").trim();
 
-        if ((certPath.length > 0) || (keyPath.length > 0) || (caPath.length > 0)) {
+        if ((certPath && certPath.length > 0) || (keyPath && keyPath.length > 0) || (caPath && caPath.length > 0)) {
 
             if ( (certPath.length > 0) !== (keyPath.length > 0)) {
                 this.valid = false;
@@ -55,7 +56,7 @@ module.exports = function(RED) {
                 return;
             }
         }
-        else if (p12Path.length > 0) {
+        else if (p12Path && p12Path.length > 0) {
             try {
                 this.pfx = fs.readFileSync(p12Path);
             }
diff --git a/test/resources/50-file-test-file.txt b/test/resources/50-file-test-file.txt
new file mode 100644
index 000000000..0491f12fe
--- /dev/null
+++ b/test/resources/50-file-test-file.txt
@@ -0,0 +1,2 @@
+File message line 1
+File message line 2
diff --git a/test/unit/@node-red/runtime/lib/nodes/.testUserHome/.config.runtime.json b/test/unit/@node-red/runtime/lib/nodes/.testUserHome/.config.runtime.json
new file mode 100644
index 000000000..7bf5a81bd
--- /dev/null
+++ b/test/unit/@node-red/runtime/lib/nodes/.testUserHome/.config.runtime.json
@@ -0,0 +1,4 @@
+{
+    "instanceId": "bff8dba3f474d406",
+    "_credentialSecret": "c9ca84d93a4f6236426cc740b147b50f32b3dd9aab9f4191390a604197722a4d"
+}
\ No newline at end of file