diff --git a/cmd/toolsrv/integration_test.go b/cmd/toolsrv/integration_test.go
index 2a65e9d..b40f5d8 100644
--- a/cmd/toolsrv/integration_test.go
+++ b/cmd/toolsrv/integration_test.go
@@ -53,14 +53,43 @@ func startTestServer(t *testing.T) (socketPath string, cleanup func()) {
 		t.Fatalf("failed to create temp dir: %v", err)
 	}
 
+	// Create sandbox config in temp dir
+	cfgDir := filepath.Join(tmpDir, "ollie")
+	if err := os.MkdirAll(cfgDir, 0755); err != nil {
+		os.RemoveAll(tmpDir)
+		t.Fatalf("failed to create config dir: %v", err)
+	}
+	sandboxCfg := `filesystem:
+  rox:
+    - /usr
+    - /lib
+    - /lib64
+    - /bin
+    - /sbin
+    - /etc
+  rwx:
+    - "{CWD}"
+    - "{TMPDIR}"
+    - "{HOME}"
+network:
+  unrestricted: true
+`
+	if err := os.WriteFile(filepath.Join(cfgDir, "sandbox.yaml"), []byte(sandboxCfg), 0644); err != nil {
+		os.RemoveAll(tmpDir)
+		t.Fatalf("failed to write sandbox.yaml: %v", err)
+	}
+
 	socketPath = filepath.Join(tmpDir, "toolsrv.sock")
 	cwd, _ := os.Getwd()
 
 	ctx, cancel := context.WithCancel(context.Background())
 	cmd := exec.CommandContext(ctx, testToolsrvBinary, "serve", "--cwd", cwd, "--listen", socketPath)
 	cmd.Stderr = os.Stderr
-	// Set session ID so tool registry is configured
-	cmd.Env = append(os.Environ(), "OLLIE_SESSION_ID=test-session")
+	// Set session ID so tool registry is configured, and XDG_CONFIG_HOME so sandbox.yaml is found
+	cmd.Env = append(os.Environ(),
+		"OLLIE_SESSION_ID=test-session",
+		"XDG_CONFIG_HOME="+tmpDir,
+	)
 
 	if err := cmd.Start(); err != nil {
 		cancel()