diff --git a/server/internal/db/sessions_test.go b/server/internal/db/sessions_test.go
index 208d1ae..6fd52c0 100644
--- a/server/internal/db/sessions_test.go
+++ b/server/internal/db/sessions_test.go
@@ -29,6 +29,7 @@ func TestSessionOperations(t *testing.T) {
 		DisplayName:  "Test User",
 		PasswordHash: "hash",
 		Role:         "editor",
+		Theme:        "dark",
 	})
 	if err != nil {
 		t.Fatalf("failed to create test user: %v", err)
diff --git a/server/internal/db/struct_query_test.go b/server/internal/db/struct_query_test.go
index 71e2c64..d4d4be8 100644
--- a/server/internal/db/struct_query_test.go
+++ b/server/internal/db/struct_query_test.go
@@ -156,6 +156,7 @@ func TestStructQueries(t *testing.T) {
 		DisplayName:  "Struct Query Test",
 		PasswordHash: "hashed_password",
 		Role:         models.RoleEditor,
+		Theme:        "dark",
 	}
 
 	t.Run("InsertStructQuery", func(t *testing.T) {
@@ -243,6 +244,7 @@ func TestStructQueries(t *testing.T) {
 			DisplayName:  "Struct Query Test 2",
 			PasswordHash: "hashed_password2",
 			Role:         models.RoleViewer,
+			Theme:        "light",
 		}
 
 		createdUser2, err := database.CreateUser(secondUser)
@@ -437,6 +439,7 @@ func TestEncryptedFields(t *testing.T) {
 		DisplayName:  "Encryption Test",
 		PasswordHash: "hash",
 		Role:         models.RoleEditor,
+		Theme:        "dark",
 	})
 	if err != nil {
 		t.Fatalf("Failed to create test user: %v", err)
diff --git a/server/internal/db/system_test.go b/server/internal/db/system_test.go
index 38055f7..71a2fe2 100644
--- a/server/internal/db/system_test.go
+++ b/server/internal/db/system_test.go
@@ -31,12 +31,14 @@ func TestSystemOperations(t *testing.T) {
 				DisplayName:  "User 1",
 				PasswordHash: "hash1",
 				Role:         "editor",
+				Theme:        "dark",
 			},
 			{
 				Email:        "user2@test.com",
 				DisplayName:  "User 2",
 				PasswordHash: "hash2",
 				Role:         "viewer",
+				Theme:        "light",
 			},
 		}
 
diff --git a/server/internal/db/users_test.go b/server/internal/db/users_test.go
index 8dfe4f0..cd11fb7 100644
--- a/server/internal/db/users_test.go
+++ b/server/internal/db/users_test.go
@@ -34,6 +34,7 @@ func TestUserOperations(t *testing.T) {
 					DisplayName:  "Test User",
 					PasswordHash: "hashed_password",
 					Role:         models.RoleEditor,
+					Theme:        "dark",
 				},
 				wantErr: false,
 			},
@@ -44,6 +45,7 @@ func TestUserOperations(t *testing.T) {
 					DisplayName:  "Another User",
 					PasswordHash: "different_hash",
 					Role:         models.RoleViewer,
+					Theme:        "light",
 				},
 				wantErr:     true,
 				errContains: "UNIQUE constraint failed",
@@ -108,6 +110,7 @@ func TestUserOperations(t *testing.T) {
 			DisplayName:  "Get By ID User",
 			PasswordHash: "hash",
 			Role:         models.RoleEditor,
+			Theme:        "dark",
 		})
 		if err != nil {
 			t.Fatalf("failed to create test user: %v", err)
@@ -159,6 +162,7 @@ func TestUserOperations(t *testing.T) {
 			DisplayName:  "Get By Email User",
 			PasswordHash: "hash",
 			Role:         models.RoleEditor,
+			Theme:        "dark",
 		})
 		if err != nil {
 			t.Fatalf("failed to create test user: %v", err)
@@ -210,6 +214,7 @@ func TestUserOperations(t *testing.T) {
 			DisplayName:  "Original Name",
 			PasswordHash: "original_hash",
 			Role:         models.RoleEditor,
+			Theme:        "dark",
 		})
 		if err != nil {
 			t.Fatalf("failed to create test user: %v", err)
@@ -249,12 +254,14 @@ func TestUserOperations(t *testing.T) {
 				DisplayName:  "User One",
 				PasswordHash: "hash1",
 				Role:         models.RoleEditor,
+				Theme:        "dark",
 			},
 			{
 				Email:        "user2@example.com",
 				DisplayName:  "User Two",
 				PasswordHash: "hash2",
 				Role:         models.RoleViewer,
+				Theme:        "light",
 			},
 		}
 
@@ -305,6 +312,7 @@ func TestUserOperations(t *testing.T) {
 			DisplayName:  "Workspace User",
 			PasswordHash: "hash",
 			Role:         models.RoleEditor,
+			Theme:        "dark",
 		})
 		if err != nil {
 			t.Fatalf("failed to create test user: %v", err)
@@ -343,6 +351,7 @@ func TestUserOperations(t *testing.T) {
 			DisplayName:  "Delete User",
 			PasswordHash: "hash",
 			Role:         models.RoleEditor,
+			Theme:        "dark",
 		})
 		if err != nil {
 			t.Fatalf("failed to create test user: %v", err)
@@ -377,18 +386,21 @@ func TestUserOperations(t *testing.T) {
 				DisplayName:  "Admin One",
 				PasswordHash: "hash1",
 				Role:         models.RoleAdmin,
+				Theme:        "dark",
 			},
 			{
 				Email:        "admin2@example.com",
 				DisplayName:  "Admin Two",
 				PasswordHash: "hash2",
 				Role:         models.RoleAdmin,
+				Theme:        "light",
 			},
 			{
 				Email:        "editor@example.com",
 				DisplayName:  "Editor",
 				PasswordHash: "hash3",
 				Role:         models.RoleEditor,
+				Theme:        "dark",
 			},
 		}
 
diff --git a/server/internal/db/workspaces_test.go b/server/internal/db/workspaces_test.go
index fda1c98..4b58aaf 100644
--- a/server/internal/db/workspaces_test.go
+++ b/server/internal/db/workspaces_test.go
@@ -26,6 +26,7 @@ func TestWorkspaceOperations(t *testing.T) {
 		DisplayName:  "Test User",
 		PasswordHash: "hash",
 		Role:         models.RoleEditor,
+		Theme:        "dark",
 	})
 	if err != nil {
 		t.Fatalf("failed to create test user: %v", err)
diff --git a/server/internal/handlers/integration_test.go b/server/internal/handlers/integration_test.go
index 64efca0..1ccf1a4 100644
--- a/server/internal/handlers/integration_test.go
+++ b/server/internal/handlers/integration_test.go
@@ -213,6 +213,7 @@ func (h *testHarness) createTestUser(t *testing.T, email, password string, role
 		DisplayName:  "Test User",
 		PasswordHash: string(hashedPassword),
 		Role:         role,
+		Theme:        "dark",
 	}
 
 	user, err = h.DB.CreateUser(user)