diff --git a/Sources/mas/Commands/Uninstall.swift b/Sources/mas/Commands/Uninstall.swift
index 25f8a6f..4e1e591 100644
--- a/Sources/mas/Commands/Uninstall.swift
+++ b/Sources/mas/Commands/Uninstall.swift
@@ -35,7 +35,7 @@ extension Mas {
 
             if dryRun {
                 for installedApp in installedApps {
-                    printInfo("\(installedApp.appName) \(installedApp.bundlePath)")
+                    printInfo("'\(installedApp.appName)' '\(installedApp.bundlePath)'")
                 }
                 printInfo("(not removed, dry run)")
             } else {
diff --git a/Sources/mas/Controllers/MasAppLibrary.swift b/Sources/mas/Controllers/MasAppLibrary.swift
index 9325af4..cb3b45f 100644
--- a/Sources/mas/Controllers/MasAppLibrary.swift
+++ b/Sources/mas/Controllers/MasAppLibrary.swift
@@ -38,8 +38,8 @@ class MasAppLibrary: AppLibrary {
     /// - Parameter app: App to be removed.
     /// - Throws: Error if there is a problem.
     func uninstallApp(app: SoftwareProduct) throws {
-        if !userIsRoot() {
-            printWarning("Apps installed from the Mac App Store require root permission to remove.")
+        if NSUserName() != "root" {
+            throw MASError.macOSUserMustBeRoot
         }
 
         let appUrl = URL(fileURLWithPath: app.bundlePath)
@@ -55,11 +55,4 @@ class MasAppLibrary: AppLibrary {
             throw MASError.uninstallFailed
         }
     }
-
-    /// Detects whether the current user is root.
-    ///
-    /// - Returns: true if the current user is root; false otherwise
-    private func userIsRoot() -> Bool {
-        NSUserName() == "root"
-    }
 }
diff --git a/Sources/mas/Errors/MASError.swift b/Sources/mas/Errors/MASError.swift
index 7065673..4eba734 100644
--- a/Sources/mas/Errors/MASError.swift
+++ b/Sources/mas/Errors/MASError.swift
@@ -29,6 +29,7 @@ enum MASError: Error, Equatable {
 
     case notInstalled(appID: AppID)
     case uninstallFailed
+    case macOSUserMustBeRoot
 
     case noData
     case jsonParsing(data: Data?)
@@ -84,6 +85,8 @@ extension MASError: CustomStringConvertible {
             return "No apps installed with app ID \(appID)"
         case .uninstallFailed:
             return "Uninstall failed"
+        case .macOSUserMustBeRoot:
+            return "Apps installed from the Mac App Store require root permission to remove."
         case .noData:
             return "Service did not return data"
         case .jsonParsing(let data):
diff --git a/Tests/masTests/Commands/UninstallSpec.swift b/Tests/masTests/Commands/UninstallSpec.swift
index 2d171cf..c2587fc 100644
--- a/Tests/masTests/Commands/UninstallSpec.swift
+++ b/Tests/masTests/Commands/UninstallSpec.swift
@@ -43,9 +43,11 @@ public class UninstallSpec: QuickSpec {
                 it("finds an app") {
                     mockLibrary.installedApps.append(app)
                     expect {
-                        try uninstall.run(appLibrary: mockLibrary)
+                        try captureStream(stdout) {
+                            try uninstall.run(appLibrary: mockLibrary)
+                        }
                     }
-                    .toNot(throwError())
+                        == "==> 'Some App' '/tmp/Some.app'\n==> (not removed, dry run)\n"
                 }
             }
             context("wet run") {
@@ -67,12 +69,12 @@ public class UninstallSpec: QuickSpec {
                             try uninstall.run(appLibrary: mockLibrary)
                         }
                     }
-                        == "==> Some App /tmp/Some.app\n==> (not removed, dry run)\n"
+                    .toNot(throwError())
                 }
                 it("fails if there is a problem with the trash command") {
-                    var brokenUninstall = app
-                    brokenUninstall.bundlePath = "/dev/null"
-                    mockLibrary.installedApps.append(brokenUninstall)
+                    var brokenApp = app
+                    brokenApp.bundlePath = "/dev/null"
+                    mockLibrary.installedApps.append(brokenApp)
                     expect {
                         try uninstall.run(appLibrary: mockLibrary)
                     }