diff --git a/addon.go b/addon.go
index 87a99bd..0d38cd9 100644
--- a/addon.go
+++ b/addon.go
@@ -37,6 +37,9 @@ func (a *Addon) GetRemoteRelease() (body []byte, err error) {
 func (a *Addon) HasBreakingChanges(lhsToc, rhsToc string) bool {
 	lhsLines := strings.Split(lhsToc, "\n")
 	rhsLines := strings.Split(rhsToc, "\n")
+	if len(lhsLines) != len(rhsLines) {
+		return true
+	}
 	for i, lhsLine := range lhsLines {
 		rhsLine := rhsLines[i]
 		lhsLine = strings.TrimSpace(lhsLine)
@@ -81,6 +84,36 @@ func (a *Addon) Update(body []byte) (hasBreakingChanges bool, err error) {
 		return false, fmt.Errorf("error creating zip reader: %w", err)
 	}
 	log.Printf("Found %d files", len(zipReader.File))
+
+	// Yes it is quite ugly iterating twice doing the same work
+	// Maybe I fix it later but definitely not now
+	for _, file := range zipReader.File {
+		if strings.HasSuffix(file.Name, ".toc") {
+			localToc, err := os.ReadFile(a.GetLocalTocPath())
+			if err != nil {
+				if os.IsNotExist(err) {
+					localToc = []byte{}
+				} else {
+					return false, fmt.Errorf("error reading local toc: %w", err)
+				}
+			}
+
+			fileHandle, err := file.Open()
+			if err != nil {
+				return false, fmt.Errorf("error opening file: %w", err)
+			}
+			fileData, err := io.ReadAll(fileHandle)
+			if err != nil {
+				return false, fmt.Errorf("error reading file: %w", err)
+			}
+
+			if a.HasBreakingChanges(string(localToc), string(fileData)) {
+				Warning.Printf("Has breaking changes")
+				hasBreakingChanges = true
+			}
+		}
+	}
+
 	for _, file := range zipReader.File {
 		if file.FileInfo().IsDir() {
 			continue
@@ -95,21 +128,6 @@ func (a *Addon) Update(body []byte) (hasBreakingChanges bool, err error) {
 			return false, fmt.Errorf("error reading file: %w", err)
 		}
 
-		if strings.HasSuffix(file.Name, ".toc") {
-			localToc, err := os.ReadFile(a.GetLocalTocPath())
-			if err != nil {
-				if os.IsNotExist(err) {
-					localToc = []byte{}
-				} else {
-					return false, fmt.Errorf("error reading local toc: %w", err)
-				}
-			}
-			if a.HasBreakingChanges(string(localToc), string(fileData)) {
-				log.Printf("Has breaking changes")
-				hasBreakingChanges = true
-			}
-		}
-
 		localPath := filepath.Join(settings.GamePath, "Interface", "AddOns", file.Name)
 		log.Printf("Updating file %s", localPath)
 		err = UpdateFile(localPath, fileData)
@@ -117,6 +135,7 @@ func (a *Addon) Update(body []byte) (hasBreakingChanges bool, err error) {
 			return false, fmt.Errorf("error updating file: %w", err)
 		}
 	}
+
 	if hasBreakingChanges {
 		Warning.Printf("Has breaking changes")
 	}
diff --git a/addon_test.go b/addon_test.go
new file mode 100644
index 0000000..fa09ffd
--- /dev/null
+++ b/addon_test.go
@@ -0,0 +1,80 @@
+package main
+
+import (
+	"testing"
+)
+
+// Compare identical TOC strings returns false for breaking changes
+func TestHasBreakingChangesWithIdenticalTOCs(t *testing.T) {
+	addon := &Addon{}
+
+	toc := `## Interface: 70300
+    ## Title: Channeler
+    ## Version: 1.6.0
+    ## Notes: Automatically sets up chat channels
+    ## Author: Cyka
+
+    #core
+    Channeler.lua`
+
+	result := addon.HasBreakingChanges(toc, toc)
+
+	if result {
+		t.Errorf("Expected HasBreakingChanges to return false for identical TOCs, got true")
+	}
+}
+
+// Compare empty TOC strings returns false
+func TestHasBreakingChangesWithEmptyTOCs(t *testing.T) {
+	addon := &Addon{}
+
+	result := addon.HasBreakingChanges("", "")
+
+	if result {
+		t.Errorf("Expected HasBreakingChanges to return false for empty TOCs, got true")
+	}
+}
+
+// Compare TOC strings with different content returns true for breaking changes
+func TestCompareTocStringsDifferentContent(t *testing.T) {
+	addon := &Addon{}
+	lhsToc := "## Interface: 70300\n## Title: Channeler\nChanneler.lua"
+	rhsToc := "## Interface: 70300\n## Title: Channeler\nDifferentFile.lua"
+	result := addon.HasBreakingChanges(lhsToc, rhsToc)
+	if !result {
+		t.Errorf("Expected breaking changes, but got none")
+	}
+}
+
+// Compare TOC strings with different content returns true for breaking changes
+func TestCompareTocStringsNewFile(t *testing.T) {
+	addon := &Addon{}
+	lhsToc := "## Interface: 70300\n## Title: Channeler\nChanneler.lua"
+	rhsToc := "## Interface: 70300\n## Title: Channeler\nChanneler.lua\nNewFile.lua"
+	result := addon.HasBreakingChanges(lhsToc, rhsToc)
+	if !result {
+		t.Errorf("Expected breaking changes, but got none")
+	}
+}
+
+// Compare TOC strings with same content but different whitespace returns false
+func TestCompareTocStringsSameContentDifferentWhitespace(t *testing.T) {
+	addon := &Addon{}
+	lhsToc := "## Interface: 70300\n## Title: Channeler\nChanneler.lua"
+	rhsToc := "## Interface: 70300 \n## Title: Channeler \nChanneler.lua"
+	result := addon.HasBreakingChanges(lhsToc, rhsToc)
+	if result {
+		t.Errorf("Expected no breaking changes, but got some")
+	}
+}
+
+// Compare TOC strings with matching header lines (##) returns false
+func TestCompareTocStringsMatchingHeaderLines(t *testing.T) {
+	addon := &Addon{}
+	lhsToc := "## Interface: 70300\n## Title: Channeler\n## Version: 1.6.0"
+	rhsToc := "## Interface: 70300\n## Title: Channeler\n## Version: 1.6.0"
+	result := addon.HasBreakingChanges(lhsToc, rhsToc)
+	if result {
+		t.Errorf("Expected no breaking changes, but got some")
+	}
+}