diff --git a/Taskfile.yml b/Taskfile.yml
index f6954a2..58d778d 100644
--- a/Taskfile.yml
+++ b/Taskfile.yml
@@ -176,7 +176,7 @@ tasks:
     deps: [_flutter-check]
     sources:
       - lib/**/*.dart
-      - test/integration/**/*.dart
+      - test/backend/**/*.dart
     cmds:
       - stalwart-dev/test.sh
 
@@ -524,7 +524,7 @@ tasks:
     internal: true
     run: once
     cmds:
-      - task: integration
+      - task: test-backend
       - task: integration-ui
 
   ci-logs:
diff --git a/ci/main.go b/ci/main.go
index 2bc5430..f82ea3a 100644
--- a/ci/main.go
+++ b/ci/main.go
@@ -24,6 +24,7 @@ func (m *Ci) Base(source *dagger.Directory) *dagger.Container {
 			"android/",
 			"integration_test/",
 			"drift_schemas/",
+			"stalwart-dev/",
 		},
 	})
 
@@ -33,7 +34,11 @@ func (m *Ci) Base(source *dagger.Directory) *dagger.Container {
 		WithExec([]string{"apt-get", "install", "-y",
 			"clang", "cmake", "ninja-build", "pkg-config",
 			"libgtk-3-dev", "liblzma-dev", "libsecret-1-dev",
-			"libgcrypt20-dev", "libjsoncpp-dev", "sqlite3", "curl", "python3"}).
+			"libgcrypt20-dev", "libjsoncpp-dev", "sqlite3", "curl", "python3", "iproute2"}).
+		WithExec([]string{"curl", "-sL", "https://github.com/stalwartlabs/mail-server/releases/download/v0.14.1/stalwart-x86_64-unknown-linux-gnu.tar.gz", "-o", "/tmp/stalwart.tar.gz"}).
+		WithExec([]string{"tar", "-xzf", "/tmp/stalwart.tar.gz", "-C", "/usr/local/bin", "stalwart"}).
+		WithExec([]string{"chmod", "+x", "/usr/local/bin/stalwart"}).
+		WithExec([]string{"rm", "/tmp/stalwart.tar.gz"}).
 		WithMountedCache("/root/.pub-cache", dag.CacheVolume("flutter-pub-cache")).
 		WithMountedCache("/root/.gradle", dag.CacheVolume("gradle-cache")).
 		WithEnvVariable("PUB_CACHE", "/root/.pub-cache").
@@ -81,13 +86,19 @@ func (m *Ci) Check(ctx context.Context, source *dagger.Directory) (string, error
 		return analyze, err
 	}
 
-	// Run unit tests only (integration tests require Stalwart)
+	// Run unit tests
 	test, err := setup.WithExec([]string{"flutter", "test", "test/unit"}).Stdout(ctx)
 	if err != nil {
 		return test, err
 	}
 
-	return fmt.Sprintf("All checks passed!\n\nAnalysis:\n%s\n\nTests:\n%s\n", analyze, test), nil
+	// Run backend tests (requires Stalwart)
+	testBackend, err := setup.WithExec([]string{"stalwart-dev/test.sh"}).Stdout(ctx)
+	if err != nil {
+		return testBackend, err
+	}
+
+	return fmt.Sprintf("All checks passed!\n\nAnalysis:\n%s\n\nUnit Tests:\n%s\n\nBackend Tests:\n%s\n", analyze, test, testBackend), nil
 }
 
 // Build and return the Linux bundle
diff --git a/stalwart-dev/test.sh b/stalwart-dev/test.sh
index 2cf2d9f..0e5518f 100755
--- a/stalwart-dev/test.sh
+++ b/stalwart-dev/test.sh
@@ -70,13 +70,13 @@ START=$(date +%s)
 run_tests() {
   # If unit tests already produced a coverage baseline, merge integration coverage
   # into it so the final gate reflects both suites.
-  local target="${1:-test/integration/}"
+  local target="${1:-test/backend/}"
   if [ -f coverage/lcov.info ]; then
     cp coverage/lcov.info coverage/lcov.base.info
-    fvm flutter test --concurrency=1 --coverage --merge-coverage --reporter compact "$target" >"$tmp" 2>&1
+    flutter test --concurrency=1 --coverage --merge-coverage --reporter compact "$target" >"$tmp" 2>&1
     rm -f coverage/lcov.base.info
   else
-    fvm flutter test --concurrency=1 --reporter compact "$target" >"$tmp" 2>&1
+    flutter test --concurrency=1 --reporter compact "$target" >"$tmp" 2>&1
   fi
 }
 if run_tests "${@:-}"; then
@@ -86,4 +86,4 @@ else
   exit 1
 fi
 END=$(date +%s)
-echo "integration: $((END - START))s"
+echo "test-backend: $((END - START))s"
diff --git a/test/integration/account_sync_manager_test.dart b/test/backend/account_sync_manager_test.dart
similarity index 100%
rename from test/integration/account_sync_manager_test.dart
rename to test/backend/account_sync_manager_test.dart
diff --git a/test/integration/concurrent_sync_test.dart b/test/backend/concurrent_sync_test.dart
similarity index 100%
rename from test/integration/concurrent_sync_test.dart
rename to test/backend/concurrent_sync_test.dart
diff --git a/test/integration/email_repository_imap_test.dart b/test/backend/email_repository_imap_test.dart
similarity index 100%
rename from test/integration/email_repository_imap_test.dart
rename to test/backend/email_repository_imap_test.dart
diff --git a/test/integration/email_repository_jmap_test.dart b/test/backend/email_repository_jmap_test.dart
similarity index 100%
rename from test/integration/email_repository_jmap_test.dart
rename to test/backend/email_repository_jmap_test.dart
diff --git a/test/integration/imap_sync_test.dart b/test/backend/imap_sync_test.dart
similarity index 100%
rename from test/integration/imap_sync_test.dart
rename to test/backend/imap_sync_test.dart
diff --git a/test/integration/mailbox_repository_imap_test.dart b/test/backend/mailbox_repository_imap_test.dart
similarity index 100%
rename from test/integration/mailbox_repository_imap_test.dart
rename to test/backend/mailbox_repository_imap_test.dart
diff --git a/test/integration/sync_reliability_runner_test.dart b/test/backend/sync_reliability_runner_test.dart
similarity index 100%
rename from test/integration/sync_reliability_runner_test.dart
rename to test/backend/sync_reliability_runner_test.dart
diff --git a/test/integration/sync_reliability_test.dart b/test/backend/sync_reliability_test.dart
similarity index 100%
rename from test/integration/sync_reliability_test.dart
rename to test/backend/sync_reliability_test.dart