diff --git a/Tests/DatabaseClientTests/ComponentLossTests.swift b/Tests/DatabaseClientTests/ComponentLossTests.swift
new file mode 100644
index 0000000..72dd53d
--- /dev/null
+++ b/Tests/DatabaseClientTests/ComponentLossTests.swift
@@ -0,0 +1,53 @@
+import DatabaseClient
+import Dependencies
+import Foundation
+import ManualDCore
+import Testing
+
+@Suite
+struct ComponentLossTests {
+
+  @Test
+  func happyPaths() async throws {
+    try await withTestUser { user in
+      @Dependency(\.database) var database
+
+      let project = try await database.projects.create(user.id, .mock)
+
+      let componentLoss = try await database.componentLosses.create(
+        .init(projectID: project.id, name: "Test", value: 0.2)
+      )
+
+      let fetched = try await database.componentLosses.fetch(project.id)
+      #expect(fetched == [componentLoss])
+
+      let got = try await database.componentLosses.get(componentLoss.id)
+      #expect(got == componentLoss)
+
+      let updated = try await database.componentLosses.update(
+        componentLoss.id, .init(name: "Updated", value: nil)
+      )
+      #expect(updated.id == componentLoss.id)
+      #expect(updated.value == componentLoss.value)
+      #expect(updated.name == "Updated")
+
+      try await database.componentLosses.delete(componentLoss.id)
+
+    }
+  }
+
+  @Test
+  func notFound() async throws {
+    try await withDatabase {
+      @Dependency(\.database.componentLosses) var componentLosses
+
+      await #expect(throws: NotFoundError.self) {
+        try await componentLosses.delete(UUID(0))
+      }
+
+      await #expect(throws: NotFoundError.self) {
+        try await componentLosses.update(UUID(0), .init(name: "Updated"))
+      }
+    }
+  }
+}
diff --git a/Tests/DatabaseClientTests/Helpers.swift b/Tests/DatabaseClientTests/Helpers.swift
index fcc85d2..65f04b0 100644
--- a/Tests/DatabaseClientTests/Helpers.swift
+++ b/Tests/DatabaseClientTests/Helpers.swift
@@ -53,3 +53,15 @@ func withTestUser(
     try await operation(user)
   }
 }
+
+extension Project.Create {
+
+  static let mock = Self(
+    name: "Testy McTestface",
+    streetAddress: "1234 Sesame St",
+    city: "Nowhere",
+    state: "MN",
+    zipCode: "55555",
+    sensibleHeatRatio: 0.83
+  )
+}
diff --git a/Tests/DatabaseClientTests/ProjectTests.swift b/Tests/DatabaseClientTests/ProjectTests.swift
index b91c203..37585a0 100644
--- a/Tests/DatabaseClientTests/ProjectTests.swift
+++ b/Tests/DatabaseClientTests/ProjectTests.swift
@@ -152,15 +152,3 @@ struct ProjectTests {
   }
 
 }
-
-extension Project.Create {
-
-  static let mock = Self(
-    name: "Testy McTestface",
-    streetAddress: "1234 Sesame St",
-    city: "Nowhere",
-    state: "MN",
-    zipCode: "55555",
-    sensibleHeatRatio: 0.83
-  )
-}