diff --git a/Tests/CoreTests/LinuxTestIndex.swift b/Tests/CoreTests/LinuxTestIndex.swift
index f194e11f..fd7f93a9 100644
--- a/Tests/CoreTests/LinuxTestIndex.swift
+++ b/Tests/CoreTests/LinuxTestIndex.swift
@@ -1,50 +1,48 @@
 // @generated by GenerateTestCaseProvider.swift
+// swiftformat:disable all
 import XCTest
 
 #if os(Linux)
-    // Generated Test Extension for StringExtensionsTests
-    extension StringExtensionsTests {
-        static var allTests = [
-            ("testUppercaseFirst", testUppercaseFirst),
-            ("testLowercaseFirst", testLowercaseFirst),
-            ("testSuffixSubstring", testSuffixSubstring),
-        ]
-    }
-
-    // Generated Test Extension for ObjectiveCIRTests
-    extension ObjectiveCIRTests {
-        static var allTests = [
-            ("testDirtyPropertyOption", testDirtyPropertyOption),
-            ("testDirtyPropertyOptionMultiWord", testDirtyPropertyOptionMultiWord),
-            ("testEnumTypeName", testEnumTypeName),
-            ("testEnumToStringName", testEnumToStringName),
-            ("testEnumFromStringName", testEnumFromStringName),
-            ("testStatementSyntax", testStatementSyntax),
-            ("testMsgSyntax", testMsgSyntax),
-            ("testBlockSyntax", testBlockSyntax),
-            ("testScopeSyntax", testScopeSyntax),
-            ("testNestedScopeSyntax", testNestedScopeSyntax),
-            ("testIfStmt", testIfStmt),
-            ("testElseIfStmt", testElseIfStmt),
-            ("testElseStmt", testElseStmt),
-            ("testIfElseStmt", testIfElseStmt),
-        ]
-    }
-
-    // Generated Test Extension for LanguagesTests
-    extension LanguagesTests {
-        static var allTests = [
-            ("testSnakeCaseToCamelCase", testSnakeCaseToCamelCase),
-            ("testSnakeCaseToPropertyName", testSnakeCaseToPropertyName),
-            ("testSnakeCaseToCapitalizedPropertyName", testSnakeCaseToCapitalizedPropertyName),
-            ("testReservedKeywordSubstitution", testReservedKeywordSubstitution),
-        ]
-    }
-
-    // Generated Test Extension for ObjectiveCInitTests
-    extension ObjectiveCInitTests {
-        static var allTests = [
-            ("testOneOfInit", testOneOfInit),
-        ]
-    }
+// Generated Test Extension for LanguagesTests
+extension LanguagesTests {
+   static var allTests = [
+       ("testSnakeCaseToCamelCase", testSnakeCaseToCamelCase),
+       ("testSnakeCaseToPropertyName", testSnakeCaseToPropertyName),
+       ("testSnakeCaseToCapitalizedPropertyName", testSnakeCaseToCapitalizedPropertyName),
+       ("testReservedKeywordSubstitution", testReservedKeywordSubstitution)
+   ]
+}
+// Generated Test Extension for ObjectiveCIRTests
+extension ObjectiveCIRTests {
+   static var allTests = [
+       ("testDirtyPropertyOption", testDirtyPropertyOption),
+       ("testDirtyPropertyOptionMultiWord", testDirtyPropertyOptionMultiWord),
+       ("testEnumTypeName", testEnumTypeName),
+       ("testEnumToStringName", testEnumToStringName),
+       ("testEnumFromStringName", testEnumFromStringName),
+       ("testStatementSyntax", testStatementSyntax),
+       ("testMsgSyntax", testMsgSyntax),
+       ("testBlockSyntax", testBlockSyntax),
+       ("testScopeSyntax", testScopeSyntax),
+       ("testNestedScopeSyntax", testNestedScopeSyntax),
+       ("testIfStmt", testIfStmt),
+       ("testElseIfStmt", testElseIfStmt),
+       ("testElseStmt", testElseStmt),
+       ("testIfElseStmt", testIfElseStmt)
+   ]
+}
+// Generated Test Extension for ObjectiveCInitTests
+extension ObjectiveCInitTests {
+   static var allTests = [
+       ("testOneOfInit", testOneOfInit)
+   ]
+}
+// Generated Test Extension for StringExtensionsTests
+extension StringExtensionsTests {
+   static var allTests = [
+       ("testUppercaseFirst", testUppercaseFirst),
+       ("testLowercaseFirst", testLowercaseFirst),
+       ("testSuffixSubstring", testSuffixSubstring)
+   ]
+}
 #endif
diff --git a/Tests/LinuxMain.swift b/Tests/LinuxMain.swift
index e54be545..18731c3a 100644
--- a/Tests/LinuxMain.swift
+++ b/Tests/LinuxMain.swift
@@ -1,11 +1,12 @@
-@testable import CoreTests
 // @generated - Generated by GeneratedTestCaseProvider.swift
+// swiftformat:disable all
 import XCTest
+@testable import CoreTests
 
 var tests = [XCTestCaseEntry]()
-tests += [testCase(StringExtensionsTests.allTests)]
-tests += [testCase(ObjectiveCIRTests.allTests)]
-tests += [testCase(LanguagesTests.allTests)]
-tests += [testCase(ObjectiveCInitTests.allTests)]
+   tests += [testCase(LanguagesTests.allTests)]
+   tests += [testCase(ObjectiveCIRTests.allTests)]
+   tests += [testCase(ObjectiveCInitTests.allTests)]
+   tests += [testCase(StringExtensionsTests.allTests)]
 
 XCTMain(tests)
diff --git a/Utility/GenerateTestCaseProvider.swift b/Utility/GenerateTestCaseProvider.swift
index 71e3fc09..f1f40216 100755
--- a/Utility/GenerateTestCaseProvider.swift
+++ b/Utility/GenerateTestCaseProvider.swift
@@ -28,6 +28,7 @@ func printLinuxMain(withClassNames classNames: [String]) -> String {
     }.joined(separator: "\n")
     return [
         "// @generated - Generated by GeneratedTestCaseProvider.swift",
+        "// swiftformat:disable all",
         "import XCTest",
         "@testable import CoreTests",
         "",
@@ -91,11 +92,13 @@ func processDirectory(atPath path: String) {
     guard path != "" else { return }
     if let files = try? FileManager.default.contentsOfDirectory(atPath: path) {
         let generatedOutput = files
+            .sorted()
             .map { processFile(withPath: path + "/" + $0) }
             .filter { $0 != "" }
             .joined(separator: "\n")
         let output = [
             "// @generated by GenerateTestCaseProvider.swift",
+            "// swiftformat:disable all",
             "import XCTest",
             "",
             "#if os(Linux)",
diff --git a/Utility/lint.sh b/Utility/lint.sh
index ad10823b..329f9fb3 100755
--- a/Utility/lint.sh
+++ b/Utility/lint.sh
@@ -2,8 +2,38 @@
 
 set -eou pipefail
 
+update_current_line() {
+    printf "\033[1A"  # move cursor one line up
+    printf "\033[K"   # delete till end of line
+    echo "$1"
+}
+
+log_err() {
+  echo "❌ $1"
+}
+
+log_success() {
+  update_current_line "✅ $1"
+}
+
 echo "Checking for lint errors with SwiftLint"
 swift run swiftlint lint --reporter emoji
 
 echo "Checking for formatting errors with SwiftFormat"
 swift run swiftformat --lint .
+
+echo "Checking if linux test index needs to be updated"
+readonly TEMP_DIR=$(mktemp -d)
+cp -R Tests "${TEMP_DIR}"
+cp -R Utility "${TEMP_DIR}"
+cp Makefile "${TEMP_DIR}"
+(cd "${TEMP_DIR}" &&  make build_test_index_linux > /dev/null)
+# Check if files changed, fail
+if ! diff -r "${TEMP_DIR}/Tests" "Tests"; then
+  log_err "Linux test index is out-of-date. Please update with 'make build_test_index_linux' and commit the changes"
+  exit 1 
+else 
+  log_success "Linux test index is up-to-date!"
+fi
+
+
diff --git a/Utility/stable-output-test.sh b/Utility/stable-output-test.sh
index 7dab0207..02f0a51c 100755
--- a/Utility/stable-output-test.sh
+++ b/Utility/stable-output-test.sh
@@ -21,7 +21,7 @@ for lang in ${lang_options[@]}; do
     update_current_line "[${lang}] Testing output is stable (test case ${i}/100)" 
     treatment_lang_output_dir="$(mktemp -d)"
     $plank_bin --lang ${lang} --output_dir=${treatment_lang_output_dir} ${json_files}
-    if ! diff "${lang_output_dir}" "${treatment_lang_output_dir}"; then
+    if ! diff -r "${lang_output_dir}" "${treatment_lang_output_dir}"; then
       update_current_line "[${lang}] ❌ Output is unstable"
       exit 1
     fi