diff --git a/src/mono/wasm/debugger/BrowserDebugProxy/DebugStore.cs b/src/mono/wasm/debugger/BrowserDebugProxy/DebugStore.cs
index 6d6fa4c4036caf..bcb1b954171f6c 100644
--- a/src/mono/wasm/debugger/BrowserDebugProxy/DebugStore.cs
+++ b/src/mono/wasm/debugger/BrowserDebugProxy/DebugStore.cs
@@ -1207,11 +1207,9 @@ private static string EscapeAscii(string path)
             {
                 switch (c)
                 {
-                    case var _ when c >= 'a' && c <= 'z':
-                    case var _ when c >= 'A' && c <= 'Z':
-                    case var _ when char.IsDigit(c):
+                    case var _ when char.IsLetterOrDigit(c):
                     case var _ when c > 255:
-                    case var _ when c == '+' || c == ':' || c == '.' || c == '-' || c == '_' || c == '~':
+                    case var _ when c == '+' || c == ':' || c == '.' || c == '-' || c == '_' || c == '~' || c == '´' || c == '`' || c == '^' || c == '¨':
                         builder.Append(c);
                         break;
                     case var _ when c == Path.DirectorySeparatorChar:
@@ -1220,13 +1218,14 @@ private static string EscapeAscii(string path)
                         builder.Append(c);
                         break;
                     default:
-                        builder.Append(string.Format($"%{((int)c):X2}"));
+                        builder.AppendFormat("%{0:X2}", (int)c);
                         break;
                 }
             }
             return builder.ToString();
         }
 
+
         internal void AddMethod(MethodInfo mi)
         {
             if (!this.methods.ContainsKey(mi.Token))
diff --git a/src/mono/wasm/debugger/DebuggerTestSuite/MiscTests.cs b/src/mono/wasm/debugger/DebuggerTestSuite/MiscTests.cs
index 137932efa99acb..ee626ee4c9f6fa 100644
--- a/src/mono/wasm/debugger/DebuggerTestSuite/MiscTests.cs
+++ b/src/mono/wasm/debugger/DebuggerTestSuite/MiscTests.cs
@@ -964,7 +964,7 @@ await EvaluateAndCheck(
             "dotnet://debugger-test-special-char-in-path.dll/test#.cs")]
         [InlineData(
             "DebuggerTests.CheckSNonAsciiCharactersInPath",
-            "dotnet://debugger-test-special-char-in-path.dll/non-ascii-test-ął.cs")]
+            "dotnet://debugger-test-special-char-in-path.dll/non-ascii-test-ąłÅ.cs")]
         public async Task SetBreakpointInProjectWithSpecialCharactersInPath(
             string classWithNamespace, string expectedFileLocation)
         {
diff --git "a/src/mono/wasm/debugger/tests/debugger-test-special-char-in-path-#@/non-ascii-test-\304\205\305\202.cs" "b/src/mono/wasm/debugger/tests/debugger-test-special-char-in-path-#@/non-ascii-test-\304\205\305\202\303\205.cs"
similarity index 100%
rename from "src/mono/wasm/debugger/tests/debugger-test-special-char-in-path-#@/non-ascii-test-\304\205\305\202.cs"
rename to "src/mono/wasm/debugger/tests/debugger-test-special-char-in-path-#@/non-ascii-test-\304\205\305\202\303\205.cs"