diff --git a/Sources/mas/Commands/Upgrade.swift b/Sources/mas/Commands/Upgrade.swift
index bd23d93..db825b6 100644
--- a/Sources/mas/Commands/Upgrade.swift
+++ b/Sources/mas/Commands/Upgrade.swift
@@ -33,7 +33,7 @@ extension Mas {
                 throw error as? MASError ?? .searchFailed
             }
 
-            guard apps.count > 0 else {
+            guard !apps.isEmpty else {
                 printWarning("Nothing found to upgrade")
                 return
             }
diff --git a/Tests/masTests/Formatters/AppListFormatterSpec.swift b/Tests/masTests/Formatters/AppListFormatterSpec.swift
index 98ed50f..42346ae 100644
--- a/Tests/masTests/Formatters/AppListFormatterSpec.swift
+++ b/Tests/masTests/Formatters/AppListFormatterSpec.swift
@@ -25,7 +25,7 @@ public class AppListsFormatterSpec: QuickSpec {
                 products = []
             }
             it("formats nothing as empty string") {
-                expect(format(products)) == ""
+                expect(format(products)).to(beEmpty())
             }
             it("can format a single product") {
                 let product = SoftwareProductMock(
diff --git a/Tests/masTests/Formatters/SearchResultFormatterSpec.swift b/Tests/masTests/Formatters/SearchResultFormatterSpec.swift
index f92731d..10fec4b 100644
--- a/Tests/masTests/Formatters/SearchResultFormatterSpec.swift
+++ b/Tests/masTests/Formatters/SearchResultFormatterSpec.swift
@@ -25,7 +25,7 @@ public class SearchResultsFormatterSpec: QuickSpec {
                 results = []
             }
             it("formats nothing as empty string") {
-                expect(format(results, false)) == ""
+                expect(format(results, false)).to(beEmpty())
             }
             it("can format a single result") {
                 let result = SearchResult(