diff --git a/news/2 Fixes/4578.md b/news/2 Fixes/4578.md
new file mode 100644
index 000000000000..c8988451b305
--- /dev/null
+++ b/news/2 Fixes/4578.md	
@@ -0,0 +1 @@
+Show an "unknown" icon when test status is unknown.
diff --git a/resources/dark/status-unknown.svg b/resources/dark/status-unknown.svg
new file mode 100644
index 000000000000..055d724616da
--- /dev/null
+++ b/resources/dark/status-unknown.svg
@@ -0,0 +1,4 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16" enable-background="new 0 0 16 16" height="16" width="16">
+  <circle cx="8" cy="8" r="6" fill="yellow"/>
+  <text x="5" y="12" fill="#E51400">?</text>
+</svg>
diff --git a/resources/light/status-unknown.svg b/resources/light/status-unknown.svg
new file mode 100644
index 000000000000..055d724616da
--- /dev/null
+++ b/resources/light/status-unknown.svg
@@ -0,0 +1,4 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16" enable-background="new 0 0 16 16" height="16" width="16">
+  <circle cx="8" cy="8" r="6" fill="yellow"/>
+  <text x="5" y="12" fill="#E51400">?</text>
+</svg>
diff --git a/src/client/unittests/common/constants.ts b/src/client/unittests/common/constants.ts
index 74ac43e5c5eb..fe5e71044ddd 100644
--- a/src/client/unittests/common/constants.ts
+++ b/src/client/unittests/common/constants.ts
@@ -23,5 +23,6 @@ export const UNITTEST_PROVIDER: TestProvider = 'unittest';
 export enum Icons {
     discovering = 'discovering-tests.svg',
     passed = 'status-ok.svg',
-    failed = 'status-error.svg'
+    failed = 'status-error.svg',
+    unknown = 'status-unknown.svg'
 }
diff --git a/src/client/unittests/explorer/testTreeViewItem.ts b/src/client/unittests/explorer/testTreeViewItem.ts
index a94d2ce16aa2..51fc78d2bb0a 100644
--- a/src/client/unittests/explorer/testTreeViewItem.ts
+++ b/src/client/unittests/explorer/testTreeViewItem.ts
@@ -62,7 +62,7 @@ export abstract class TestTreeItem extends TreeItem {
                         return ThemeIcon.Folder;
                     }
                     default: {
-                        return '';
+                        return getIcon(Icons.unknown);
                     }
                 }
             }