diff --git a/lib/repl.js b/lib/repl.js
index a755dbf1bb107e..cc5bf069c31295 100644
--- a/lib/repl.js
+++ b/lib/repl.js
@@ -225,13 +225,13 @@ function REPLServer(prompt,
   ObjectDefineProperty(this, 'inputStream', {
     get: pendingDeprecation ?
       deprecate(() => this.input,
-                'repl.inputStream and repl.outputStream is deprecated. ' +
+                'repl.inputStream and repl.outputStream are deprecated. ' +
                   'Use repl.input and repl.output instead',
                 'DEP0141') :
       () => this.input,
     set: pendingDeprecation ?
       deprecate((val) => this.input = val,
-                'repl.inputStream and repl.outputStream is deprecated. ' +
+                'repl.inputStream and repl.outputStream are deprecated. ' +
                   'Use repl.input and repl.output instead',
                 'DEP0141') :
       (val) => this.input = val,
@@ -241,13 +241,13 @@ function REPLServer(prompt,
   ObjectDefineProperty(this, 'outputStream', {
     get: pendingDeprecation ?
       deprecate(() => this.output,
-                'repl.inputStream and repl.outputStream is deprecated. ' +
+                'repl.inputStream and repl.outputStream are deprecated. ' +
                   'Use repl.input and repl.output instead',
                 'DEP0141') :
       () => this.output,
     set: pendingDeprecation ?
       deprecate((val) => this.output = val,
-                'repl.inputStream and repl.outputStream is deprecated. ' +
+                'repl.inputStream and repl.outputStream are deprecated. ' +
                   'Use repl.input and repl.output instead',
                 'DEP0141') :
       (val) => this.output = val,
diff --git a/test/parallel/test-repl-options.js b/test/parallel/test-repl-options.js
index 3f6e16ee47fba2..546dd584ea34fe 100644
--- a/test/parallel/test-repl-options.js
+++ b/test/parallel/test-repl-options.js
@@ -35,7 +35,7 @@ common.expectWarning({
   DeprecationWarning: {
     DEP0142:
       'repl._builtinLibs is deprecated. Check module.builtinModules instead',
-    DEP0141: 'repl.inputStream and repl.outputStream is deprecated. ' +
+    DEP0141: 'repl.inputStream and repl.outputStream are deprecated. ' +
              'Use repl.input and repl.output instead',
   }
 });