diff --git a/tests/testthat/test-module_teal_data.R b/tests/testthat/test-module_teal_data.R
new file mode 100644
index 0000000000..a262e4b647
--- /dev/null
+++ b/tests/testthat/test-module_teal_data.R
@@ -0,0 +1,194 @@
+# Test file for module_teal_data.R functions
+# Tests srv_teal_data_module indirectly through srv_teal with teal_data_module objects
+
+# Helper function to create test modules - defined globally
+create_test_module <<- function(label = "test_module", datanames = "iris") {
+  module(label, server = function(id, data) data, datanames = datanames)
+}
+
+testthat::describe("srv_teal with teal_data_module (indirectly tests srv_teal_data_module)", {
+  testthat::it("handles successful teal_data_module", {
+    shiny::testServer(
+      app = srv_teal,
+      args = list(
+        id = "test",
+        data = teal_data_module(
+          ui = function(id) tags$div("Data Module UI"),
+          server = function(id) reactive(teal.data::teal_data(iris = iris))
+        ),
+        modules = modules(create_test_module()),
+        filter = teal_slices(),
+        reporter = NULL
+      ),
+      expr = {
+        # Test that the app initializes without error
+        testthat::expect_no_error({
+          session$flushReact()
+        })
+      }
+    )
+  })
+
+  testthat::it("handles teal_data_module that returns non-teal_data", {
+    shiny::testServer(
+      app = srv_teal,
+      args = list(
+        id = "test",
+        data = teal_data_module(
+          ui = function(id) tags$div("Data Module UI"),
+          server = function(id) reactive("not_teal_data")
+        ),
+        modules = modules(create_test_module()),
+        filter = teal_slices(),
+        reporter = NULL
+      ),
+      expr = {
+        # Test that the app handles invalid data gracefully
+        testthat::expect_no_error({
+          session$flushReact()
+        })
+      }
+    )
+  })
+
+  testthat::it("handles teal_data_module that throws error", {
+    shiny::testServer(
+      app = srv_teal,
+      args = list(
+        id = "test",
+        data = teal_data_module(
+          ui = function(id) tags$div("Data Module UI"),
+          server = function(id) reactive(stop("Data error"))
+        ),
+        modules = modules(create_test_module()),
+        filter = teal_slices(),
+        reporter = NULL
+      ),
+      expr = {
+        # Test that the app handles errors gracefully
+        testthat::expect_no_error({
+          session$flushReact()
+        })
+      }
+    )
+  })
+
+  testthat::it("handles teal_data_module with qenv.error", {
+    shiny::testServer(
+      app = srv_teal,
+      args = list(
+        id = "test",
+        data = teal_data_module(
+          ui = function(id) tags$div("Data Module UI"),
+          server = function(id) reactive(within(teal.data::teal_data(), stop("qenv error")))
+        ),
+        modules = modules(create_test_module()),
+        filter = teal_slices(),
+        reporter = NULL
+      ),
+      expr = {
+        # Test that the app handles qenv errors gracefully
+        testthat::expect_no_error({
+          session$flushReact()
+        })
+      }
+    )
+  })
+
+  testthat::it("handles teal_data_module with shiny.silent.error", {
+    shiny::testServer(
+      app = srv_teal,
+      args = list(
+        id = "test",
+        data = teal_data_module(
+          ui = function(id) tags$div("Data Module UI"),
+          server = function(id) reactive(structure(list(message = ""), class = "shiny.silent.error"))
+        ),
+        modules = modules(create_test_module()),
+        filter = teal_slices(),
+        reporter = NULL
+      ),
+      expr = {
+        # Test that the app handles shiny.silent.error gracefully
+        testthat::expect_no_error({
+          session$flushReact()
+        })
+      }
+    )
+  })
+
+  testthat::it("handles teal_data_module with once = TRUE", {
+    shiny::testServer(
+      app = srv_teal,
+      args = list(
+        id = "test",
+        data = structure(
+          teal_data_module(
+            ui = function(id) tags$div("Data Module UI"),
+            server = function(id) reactive(teal.data::teal_data(iris = iris))
+          ),
+          once = TRUE
+        ),
+        modules = modules(create_test_module()),
+        filter = teal_slices(),
+        reporter = NULL
+      ),
+      expr = {
+        # Test that the app handles once = TRUE teal_data_module
+        testthat::expect_no_error({
+          session$flushReact()
+        })
+      }
+    )
+  })
+
+  testthat::it("handles teal_data_module with complex data", {
+    shiny::testServer(
+      app = srv_teal,
+      args = list(
+        id = "test",
+        data = teal_data_module(
+          ui = function(id) tags$div("Data Module UI"),
+          server = function(id) {
+            reactive(teal.data::teal_data(
+              iris = iris,
+              mtcars = mtcars,
+              join_keys = teal.data::join_keys(teal.data::join_key("iris", "iris", "Species"))
+            ))
+          }
+        ),
+        modules = modules(create_test_module()),
+        filter = teal_slices(),
+        reporter = NULL
+      ),
+      expr = {
+        # Test that the app handles complex teal_data
+        testthat::expect_no_error({
+          session$flushReact()
+        })
+      }
+    )
+  })
+
+  testthat::it("handles teal_data_module with validation errors", {
+    shiny::testServer(
+      app = srv_teal,
+      args = list(
+        id = "test",
+        data = teal_data_module(
+          ui = function(id) tags$div("Data Module UI"),
+          server = function(id) reactive(teal.data::teal_data(iris = iris))
+        ),
+        modules = modules(create_test_module()),
+        filter = teal_slices(),
+        reporter = NULL
+      ),
+      expr = {
+        # Test that validation functions work correctly
+        testthat::expect_no_error({
+          session$flushReact()
+        })
+      }
+    )
+  })
+})