diff --git a/lib/util/settings.js b/lib/util/settings.js
index f7308e48..276b8b8e 100644
--- a/lib/util/settings.js
+++ b/lib/util/settings.js
@@ -473,15 +473,15 @@ function applyEnvironmentVariables(settings) {
 
                         if (type.indexOf('object') >= 0 || type.indexOf('array') >= 0) {
                             setting[key] = JSON.parse(process.env[envVariableName]);
-                        }
-                        if (type.indexOf('number') >= 0) {
+                        } else if (type.indexOf('number') >= 0) {
                             setting[key] = process.env[envVariableName] * 1;
-                        }
-                        if (type.indexOf('boolean') >= 0) {
+                        } else if (type.indexOf('boolean') >= 0) {
                             setting[key] = process.env[envVariableName].toLowerCase() === 'true';
-                        }
-                        if (type.indexOf('string') >= 0) {
-                            setting[key] = process.env[envVariableName];
+                        } else {
+                            /* istanbul ignore else */
+                            if (type.indexOf('string') >= 0) {
+                                setting[key] = process.env[envVariableName];
+                            }
                         }
                     }
                 }