diff --git a/src/safety/FaultInjector.ts b/src/safety/FaultInjector.ts
index 31174c4..0e33816 100644
--- a/src/safety/FaultInjector.ts
+++ b/src/safety/FaultInjector.ts
@@ -399,7 +399,9 @@ export class FaultInjector {
                         className: 'fis-close',
                         id: 'fis-close-btn',
                         textContent: '✕',
-                        'aria-label': 'Close Fault Injection System'
+                        'aria-label': 'Close Fault Injection System',
+                        'aria-keyshortcuts': 'Escape',
+                        title: 'Close [Esc]'
                     })
                 ]),
                 createElement('div', {
diff --git a/tests/Game_orbit_optimization.test.ts b/tests/Game_orbit_optimization.test.ts
index b474b36..dbd3ffe 100644
--- a/tests/Game_orbit_optimization.test.ts
+++ b/tests/Game_orbit_optimization.test.ts
@@ -42,7 +42,10 @@ const mockDocument = {
     createElement: vi.fn((tag: string) => ({
         id: tag,
         getContext: () => ({}),
-        addEventListener: () => { }
+        addEventListener: () => { },
+        setAttribute: vi.fn(),
+        style: {},
+        appendChild: vi.fn()
     })),
     addEventListener: vi.fn()
 };
diff --git a/tests/Game_orbit_path_length.test.ts b/tests/Game_orbit_path_length.test.ts
index 582410d..c00244e 100644
--- a/tests/Game_orbit_path_length.test.ts
+++ b/tests/Game_orbit_path_length.test.ts
@@ -43,7 +43,10 @@ const mockDocument = {
     createElement: vi.fn((tag: string) => ({
         id: tag,
         getContext: () => ({}),
-        addEventListener: () => { }
+        addEventListener: () => { },
+        setAttribute: vi.fn(),
+        style: {},
+        appendChild: vi.fn()
     })),
     addEventListener: vi.fn()
 };
diff --git a/tests/HUDLogic.test.ts b/tests/HUDLogic.test.ts
index 1a1dd3a..6af611c 100644
--- a/tests/HUDLogic.test.ts
+++ b/tests/HUDLogic.test.ts
@@ -30,7 +30,10 @@ vi.stubGlobal('document', {
         getContext: () => ({}),
         width: 0,
         height: 0,
-        addEventListener: vi.fn()
+        addEventListener: vi.fn(),
+        setAttribute: vi.fn(),
+        style: {},
+        appendChild: vi.fn()
     })),
     addEventListener: vi.fn(),
 });
diff --git a/tests/HUD_comprehensive.test.ts b/tests/HUD_comprehensive.test.ts
index 7f06b74..aa12e58 100644
--- a/tests/HUD_comprehensive.test.ts
+++ b/tests/HUD_comprehensive.test.ts
@@ -59,7 +59,10 @@ vi.stubGlobal('document', {
         getContext: () => ({}),
         width: 0,
         height: 0,
-        addEventListener: vi.fn()
+        addEventListener: vi.fn(),
+        setAttribute: vi.fn(),
+        style: {},
+        appendChild: vi.fn()
     })),
     addEventListener: vi.fn(),
 });
diff --git a/tests/Performance.test.ts b/tests/Performance.test.ts
index b8d6b48..df06530 100644
--- a/tests/Performance.test.ts
+++ b/tests/Performance.test.ts
@@ -42,7 +42,10 @@ const mockDocument = {
     createElement: vi.fn((tag: string) => ({
         id: tag,
         getContext: () => ({}),
-        addEventListener: () => { }
+        addEventListener: () => { },
+        setAttribute: vi.fn(),
+        style: {},
+        appendChild: vi.fn()
     })),
     addEventListener: vi.fn()
 };
diff --git a/tests/benchmark_wind_render.test.ts b/tests/benchmark_wind_render.test.ts
index 3dc306a..010b5c2 100644
--- a/tests/benchmark_wind_render.test.ts
+++ b/tests/benchmark_wind_render.test.ts
@@ -44,7 +44,7 @@ const mockDocument = {
             addEventListener: () => { }
         };
     },
-    createElement: () => ({ style: {} }),
+    createElement: () => ({ style: {}, setAttribute: vi.fn(), appendChild: vi.fn(), addEventListener: vi.fn() }),
     addEventListener: () => { }
 };