diff --git a/lua/neotest-rust/dap.lua b/lua/neotest-rust/dap.lua
index 174dce9..9f771d9 100644
--- a/lua/neotest-rust/dap.lua
+++ b/lua/neotest-rust/dap.lua
@@ -82,7 +82,7 @@ end
 
 -- Determine if mod is in <mod_name>.rs or <mod_name>/mod.rs
 local function construct_mod_path(src_path, mod_name)
-    local match_str = "(.-)[^\\/]-%.?(%w+)%.?[^\\/]*$"
+    local match_str = "(.-)[^\\/]-%.?([%w_]+)%.?[^\\/]*$"
     local abs_path, parent_mod = string.match(src_path, match_str)
 
     local mod_file = abs_path .. mod_name .. ".rs"
diff --git a/tests/data/simple-package/src/main.rs b/tests/data/simple-package/src/main.rs
index bb0a2f4..693614a 100644
--- a/tests/data/simple-package/src/main.rs
+++ b/tests/data/simple-package/src/main.rs
@@ -1,5 +1,6 @@
 mod mymod;
 mod parent;
+mod other_mod;
 
 fn main() {
     println!("Hello, world!");
diff --git a/tests/data/simple-package/src/other_mod.rs b/tests/data/simple-package/src/other_mod.rs
new file mode 100644
index 0000000..f4ad3bf
--- /dev/null
+++ b/tests/data/simple-package/src/other_mod.rs
@@ -0,0 +1 @@
+mod foo;
diff --git a/tests/data/simple-package/src/other_mod/foo.rs b/tests/data/simple-package/src/other_mod/foo.rs
new file mode 100644
index 0000000..c1e9866
--- /dev/null
+++ b/tests/data/simple-package/src/other_mod/foo.rs
@@ -0,0 +1,7 @@
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn math() {
+        assert_eq!(1 + 1, 2);
+    }
+}
diff --git a/tests/init_spec.lua b/tests/init_spec.lua
index 6e63051..e1c8c42 100644
--- a/tests/init_spec.lua
+++ b/tests/init_spec.lua
@@ -26,7 +26,7 @@ describe("discover_positions", function()
                 id = vim.loop.cwd() .. "/tests/data/simple-package/src/main.rs",
                 name = "main.rs",
                 path = vim.loop.cwd() .. "/tests/data/simple-package/src/main.rs",
-                range = { 0, 0, 26, 0 },
+                range = { 0, 0, 27, 0 },
                 type = "file",
             },
             {
@@ -34,7 +34,7 @@ describe("discover_positions", function()
                     id = "tests",
                     name = "tests",
                     path = vim.loop.cwd() .. "/tests/data/simple-package/src/main.rs",
-                    range = { 8, 0, 25, 1 },
+                    range = { 9, 0, 26, 1 },
                     type = "namespace",
                 },
                 {
@@ -42,7 +42,7 @@ describe("discover_positions", function()
                         id = "tests::basic_math",
                         name = "basic_math",
                         path = vim.loop.cwd() .. "/tests/data/simple-package/src/main.rs",
-                        range = { 10, 4, 12, 5 },
+                        range = { 11, 4, 13, 5 },
                         type = "test",
                     },
                 },
@@ -51,7 +51,7 @@ describe("discover_positions", function()
                         id = "tests::failed_math",
                         name = "failed_math",
                         path = vim.loop.cwd() .. "/tests/data/simple-package/src/main.rs",
-                        range = { 15, 4, 17, 5 },
+                        range = { 16, 4, 18, 5 },
                         type = "test",
                     },
                 },
@@ -60,7 +60,7 @@ describe("discover_positions", function()
                         id = "tests::nested",
                         name = "nested",
                         path = vim.loop.cwd() .. "/tests/data/simple-package/src/main.rs",
-                        range = { 19, 4, 24, 5 },
+                        range = { 20, 4, 25, 5 },
                         type = "namespace",
                     },
                     {
@@ -68,7 +68,7 @@ describe("discover_positions", function()
                             id = "tests::nested::nested_math",
                             name = "nested_math",
                             path = vim.loop.cwd() .. "/tests/data/simple-package/src/main.rs",
-                            range = { 21, 8, 23, 9 },
+                            range = { 22, 8, 24, 9 },
                             type = "test",
                         },
                     },
@@ -465,6 +465,20 @@ describe("build_spec", function()
             assert.equal(spec.cwd, vim.loop.cwd() .. "/tests/data/simple-package")
         end)
 
+        it("can run tests in other_mod/foo.rs", function()
+            local tree = Tree:new({
+                type = "file",
+                path = vim.loop.cwd() .. "/tests/data/simple-package/src/other_mod/foo.rs",
+                id = vim.loop.cwd() .. "/tests/data/simple-package/src/other_mod/foo.rs",
+            }, {}, function(data)
+                return data
+            end, {})
+
+            local spec = plugin.build_spec({ tree = tree })
+            assert.equal(spec.context.test_filter, "-E " .. vim.fn.shellescape("test(/^other_mod::foo::/)"))
+            assert.equal(spec.cwd, vim.loop.cwd() .. "/tests/data/simple-package")
+        end)
+
         it("can run a single integration test", function()
             local tree = Tree:new({
                 type = "test",
@@ -791,6 +805,23 @@ describe("build_spec", function()
                 assert.equal(spec.cwd, vim.loop.cwd() .. "/tests/data/simple-package")
             end)
 
+            async.it("can debug tests in other_mod/foo.rs", function()
+                local tree = Tree:new({
+                    type = "file",
+                    path = vim.loop.cwd() .. "/tests/data/simple-package/src/other_mod/foo.rs",
+                    id = vim.loop.cwd() .. "/tests/data/simple-package/src/other_mod/foo.rs",
+                }, {}, function(data)
+                    return data
+                end, {})
+
+                local spec = plugin.build_spec({ tree = tree, strategy = "dap" })
+                assert.are.same(spec.strategy.args, {
+                    "--nocapture",
+                    "other_mod::foo",
+                })
+                assert.equal(spec.cwd, vim.loop.cwd() .. "/tests/data/simple-package")
+            end)
+
             async.it("can debug a single integration test", function()
                 local tree = Tree:new({
                     type = "test",