diff --git a/Sources/ISDBTestSupport/TibsTestWorkspace.swift b/Sources/ISDBTestSupport/TibsTestWorkspace.swift
index 4307373..6012adc 100644
--- a/Sources/ISDBTestSupport/TibsTestWorkspace.swift
+++ b/Sources/ISDBTestSupport/TibsTestWorkspace.swift
@@ -304,7 +304,7 @@ extension XCTestCase {
   }()
 
   /// The path to the built products directory.
-  public static var productsDirectory: URL = {
+  public static let productsDirectory: URL = {
     #if os(macOS)
       return testBundle.bundleURL.deletingLastPathComponent()
     #else
diff --git a/Sources/IndexStoreDB/IndexStoreDB.swift b/Sources/IndexStoreDB/IndexStoreDB.swift
index bf9eb04..98b19ae 100644
--- a/Sources/IndexStoreDB/IndexStoreDB.swift
+++ b/Sources/IndexStoreDB/IndexStoreDB.swift
@@ -38,7 +38,7 @@ public struct PathMapping {
   }
 }
 
-public enum SymbolProviderKind {
+public enum SymbolProviderKind: Sendable {
   case clang
   case swift
 
diff --git a/Sources/IndexStoreDB/SymbolLocation.swift b/Sources/IndexStoreDB/SymbolLocation.swift
index ca4f458..7b03761 100644
--- a/Sources/IndexStoreDB/SymbolLocation.swift
+++ b/Sources/IndexStoreDB/SymbolLocation.swift
@@ -14,7 +14,7 @@
 import CIndexStoreDB
 import Foundation
 
-public struct SymbolLocation: Equatable {
+public struct SymbolLocation: Equatable, Sendable {
   public var path: String
   /// The date at which the unit file that contains a symbol has last been modified.
   public var timestamp: Date