diff --git a/src/runner/runner.ts b/src/runner/runner.ts
index 138349d..6dbbe3c 100644
--- a/src/runner/runner.ts
+++ b/src/runner/runner.ts
@@ -407,6 +407,25 @@ export class TestRunner extends vscode.Disposable {
       return
 
     const coverage = readCoverageReport(reportsDirectory)
+    // TODO: quick patch, coverage shouldn't report negative columns
+    function ensureLoc(loc: any) {
+      if (!loc) {
+        return
+      }
+      if (loc.start?.column && loc.start.column < 0) {
+        loc.start.column = 0
+      }
+      if (loc.end?.column && loc.end.column < 0) {
+        loc.end.column = 0
+      }
+    }
+    for (const file in coverage) {
+      for (const key in coverage[file].branchMap) {
+        const branch = coverage[file].branchMap[key]
+        ensureLoc(branch.loc)
+        branch.locations?.forEach((loc: any) => ensureLoc(loc))
+      }
+    }
     await coverageContext.applyJson(testRun, coverage)
 
     rm(reportsDirectory, { recursive: true, force: true }).then(() => {
diff --git a/src/testTree.ts b/src/testTree.ts
index 97a8816..3946067 100644
--- a/src/testTree.ts
+++ b/src/testTree.ts
@@ -21,6 +21,7 @@ export class TestTree extends vscode.Disposable {
   // file test items have the project name in their id, so we need a separate map
   // to store all of them
   private testItemsByFile = new Map<string, vscode.TestItem[]>()
+  private testFiles = new Set<string>()
 
   private watcher: ExtensionWatcher
 
@@ -134,7 +135,7 @@ export class TestTree extends vscode.Disposable {
     if (cached)
       return cached
 
-    const fileUri = vscode.Uri.file(file)
+    const fileUri = vscode.Uri.file(resolve(file))
     const parentItem = this.getOrCreateFolderTestItem(api, dirname(file))
     const label = `${basename(file)}${project ? ` [${project}]` : ''}`
     const testFileItem = this.controller.createTestItem(
@@ -159,10 +160,11 @@ export class TestTree extends vscode.Disposable {
     const cachedItems = this.testItemsByFile.get(normalizedFile) || []
     cachedItems.push(testFileItem)
     this.testItemsByFile.set(normalizedFile, cachedItems)
+    this.testFiles.add(fileUri.fsPath)
     vscode.commands.executeCommand(
       'setContext',
       'vitest.testFiles',
-      Array.from(this.testItemsByFile.keys()),
+      Array.from(this.testFiles),
     )
 
     return testFileItem