diff --git a/__tests__/resolution.test.ts b/__tests__/resolution.test.ts
index caf41c7df..ea7c190ca 100644
--- a/__tests__/resolution.test.ts
+++ b/__tests__/resolution.test.ts
@@ -1964,6 +1964,7 @@ func main() {
     // feature can't silently regress to a no-op in the indexing flow.
     it('connects #include to the real header file via include-dir scan (end-to-end)', async () => {
       const tempProject = fs.mkdtempSync(path.join(os.tmpdir(), 'codegraph-cpp-e2e-'));
+      let db: DatabaseConnection | undefined;
       try {
         fs.mkdirSync(path.join(tempProject, 'include'), { recursive: true });
         fs.mkdirSync(path.join(tempProject, 'src'), { recursive: true });
@@ -1986,7 +1987,7 @@ func main() {
         // The `#include "utils.h"` edge should target the real
         // `include/utils.h` file node — not a floating `import` node
         // living inside main.cpp.
-        const db = DatabaseConnection.open(path.join(tempProject, '.codegraph', 'codegraph.db'));
+        db = DatabaseConnection.open(path.join(tempProject, '.codegraph', 'codegraph.db'));
         const rows = db.getDb().prepare(`
           select dst.kind as dstKind, dst.file_path as dstPath
           from edges e
@@ -2006,6 +2007,12 @@ func main() {
         );
         expect(stdlibFile).toBeUndefined();
       } finally {
+        // Close every SQLite handle on tempProject before removing it — the
+        // local reader AND the CodeGraph instance (afterEach's cg.destroy()
+        // runs too late, after this rmSync). On Windows an open handle locks
+        // the file and rmSync throws EPERM; POSIX silently unlinks it.
+        db?.close();
+        cg?.close();
         fs.rmSync(tempProject, { recursive: true, force: true });
       }
     });
@@ -2034,6 +2041,7 @@ func main() {
 
     it('resolves require_once to a file→file imports edge (#660)', async () => {
       const tempProject = fs.mkdtempSync(path.join(os.tmpdir(), 'codegraph-php-e2e-'));
+      let db: DatabaseConnection | undefined;
       try {
         fs.mkdirSync(path.join(tempProject, 'src'), { recursive: true });
         fs.writeFileSync(
@@ -2050,7 +2058,7 @@ func main() {
         // reporter's repro: page.php's `require_once("lib.php")` must resolve
         // to the real src/lib.php file node — a file→file `imports` edge, so
         // callers(lib.php) now includes page.php.
-        const db = DatabaseConnection.open(path.join(tempProject, '.codegraph', 'codegraph.db'));
+        db = DatabaseConnection.open(path.join(tempProject, '.codegraph', 'codegraph.db'));
         const rows = db.getDb().prepare(`
           select dst.kind as dstKind, dst.file_path as dstPath
           from edges e
@@ -2065,12 +2073,17 @@ func main() {
         );
         expect(resolved, 'page.php → src/lib.php imports edge missing').toBeDefined();
       } finally {
+        // Close the local reader and the CodeGraph instance before rmSync so
+        // Windows doesn't EPERM on a still-open SQLite handle (see above).
+        db?.close();
+        cg?.close();
         fs.rmSync(tempProject, { recursive: true, force: true });
       }
     });
 
     it('resolves a subdirectory include path to the correct file (#660)', async () => {
       const tempProject = fs.mkdtempSync(path.join(os.tmpdir(), 'codegraph-php-subdir-'));
+      let db: DatabaseConnection | undefined;
       try {
         fs.mkdirSync(path.join(tempProject, 'inc'), { recursive: true });
         fs.writeFileSync(
@@ -2084,7 +2097,7 @@ func main() {
 
         cg = await CodeGraph.init(tempProject, { index: true });
 
-        const db = DatabaseConnection.open(path.join(tempProject, '.codegraph', 'codegraph.db'));
+        db = DatabaseConnection.open(path.join(tempProject, '.codegraph', 'codegraph.db'));
         const rows = db.getDb().prepare(`
           select dst.kind as dstKind, dst.file_path as dstPath
           from edges e
@@ -2099,12 +2112,17 @@ func main() {
           'index.php → inc/db.php imports edge missing'
         ).toBeDefined();
       } finally {
+        // Close the local reader and the CodeGraph instance before rmSync so
+        // Windows doesn't EPERM on a still-open SQLite handle (see above).
+        db?.close();
+        cg?.close();
         fs.rmSync(tempProject, { recursive: true, force: true });
       }
     });
 
     it('does not mis-connect an unresolvable include to a same-named file elsewhere (#660)', async () => {
       const tempProject = fs.mkdtempSync(path.join(os.tmpdir(), 'codegraph-php-misresolve-'));
+      let db: DatabaseConnection | undefined;
       try {
         // app/page.php's `require "inc/db.php"` resolves relative to app/, where
         // inc/db.php does NOT exist. A same-named lib/inc/db.php exists elsewhere
@@ -2123,7 +2141,7 @@ func main() {
 
         cg = await CodeGraph.init(tempProject, { index: true });
 
-        const db = DatabaseConnection.open(path.join(tempProject, '.codegraph', 'codegraph.db'));
+        db = DatabaseConnection.open(path.join(tempProject, '.codegraph', 'codegraph.db'));
         const rows = db.getDb().prepare(`
           select dst.kind as dstKind, dst.file_path as dstPath
           from edges e
@@ -2138,6 +2156,10 @@ func main() {
           'app/page.php must NOT mis-connect to unrelated lib/inc/db.php'
         ).toBeUndefined();
       } finally {
+        // Close the local reader and the CodeGraph instance before rmSync so
+        // Windows doesn't EPERM on a still-open SQLite handle (see above).
+        db?.close();
+        cg?.close();
         fs.rmSync(tempProject, { recursive: true, force: true });
       }
     });