diff --git a/.luarc.json b/.luarc.json
index 17a5072..3c99bde 100644
--- a/.luarc.json
+++ b/.luarc.json
@@ -2,5 +2,6 @@
     "diagnostics.globals": [
         "describe",
         "it",
+        "before_each",
     ]
 }
diff --git a/lua/precognition/init.lua b/lua/precognition/init.lua
index 60b9795..a0f1922 100644
--- a/lua/precognition/init.lua
+++ b/lua/precognition/init.lua
@@ -386,6 +386,9 @@ local state = {
     extmark = function()
         return extmark
     end,
+    gutter_group = function()
+        return gutter_group
+    end,
     ns = function()
         return ns
     end,
diff --git a/tests/precognition/e2e_spec.lua b/tests/precognition/e2e_spec.lua
index b7eda5c..70b6493 100644
--- a/tests/precognition/e2e_spec.lua
+++ b/tests/precognition/e2e_spec.lua
@@ -2,6 +2,20 @@ local precognition = require("precognition")
 ---@diagnostic disable-next-line: undefined-field
 local eq = assert.are.same
 
+local function get_gutter_extmarks(buffer)
+    local gutter_extmarks = {}
+    for _, extmark in
+        pairs(vim.api.nvim_buf_get_extmarks(buffer, -1, 0, -1, {
+            details = true,
+        }))
+    do
+        if extmark[4] and extmark[4].sign_name and extmark[4].sign_name:match(precognition.gutter_group) then
+            table.insert(gutter_extmarks, extmark)
+        end
+    end
+    return gutter_extmarks
+end
+
 describe("e2e tests", function()
     before_each(function()
         precognition.setup({})
@@ -26,7 +40,13 @@ describe("e2e tests", function()
     it("virtual line is displayed and updated", function()
         local buffer = vim.api.nvim_create_buf(true, false)
         vim.api.nvim_set_current_buf(buffer)
-        vim.api.nvim_buf_set_lines(buffer, 0, -1, false, { "Hello World this is a test", "line 2" })
+        vim.api.nvim_buf_set_lines(
+            buffer,
+            0,
+            -1,
+            false,
+            { "Hello World this is a test", "line 2", "", "line 4", "", "line 6" }
+        )
         vim.api.nvim_win_set_cursor(0, { 1, 1 })
 
         precognition.on_cursor_moved()
@@ -35,6 +55,22 @@ describe("e2e tests", function()
             details = true,
         })
 
+        local gutter_extmarks = get_gutter_extmarks(buffer)
+
+        for _, extmark in pairs(gutter_extmarks) do
+            if extmark[4].sign_text == "G " then
+                eq(5, extmark[2])
+            elseif extmark[4].sign_text == "gg" then
+                eq(0, extmark[2])
+            elseif extmark[4].sign_text == "{ " then
+                eq(0, extmark[2])
+            elseif extmark[4].sign_text == "} " then
+                eq(2, extmark[2])
+            else
+                assert(false, "unexpected sign text")
+            end
+        end
+
         eq(vim.api.nvim_win_get_cursor(0)[1] - 1, extmarks[1])
         eq("b   e w                  $", extmarks[3].virt_lines[1][1][1])
 
@@ -71,11 +107,45 @@ describe("e2e tests", function()
         vim.api.nvim_win_set_cursor(0, { 2, 1 })
         precognition.on_cursor_moved()
 
+        gutter_extmarks = get_gutter_extmarks(buffer)
+
         extmarks = vim.api.nvim_buf_get_extmark_by_id(buffer, precognition.ns, precognition.extmark, {
             details = true,
         })
 
+        for _, extmark in pairs(gutter_extmarks) do
+            if extmark[4].sign_text == "G " then
+                eq(5, extmark[2])
+            elseif extmark[4].sign_text == "gg" then
+                eq(0, extmark[2])
+            elseif extmark[4].sign_text == "{ " then
+                eq(0, extmark[2])
+            elseif extmark[4].sign_text == "} " then
+                eq(2, extmark[2])
+            else
+                assert(false, "unexpected sign text")
+            end
+        end
+
         eq(vim.api.nvim_win_get_cursor(0)[1] - 1, extmarks[1])
         eq("b  e w", extmarks[3].virt_lines[1][1][1])
+
+        vim.api.nvim_win_set_cursor(0, { 4, 1 })
+        precognition.on_cursor_moved()
+        gutter_extmarks = get_gutter_extmarks(buffer)
+
+        for _, extmark in pairs(gutter_extmarks) do
+            if extmark[4].sign_text == "G " then
+                eq(5, extmark[2])
+            elseif extmark[4].sign_text == "gg" then
+                eq(0, extmark[2])
+            elseif extmark[4].sign_text == "{ " then
+                eq(2, extmark[2])
+            elseif extmark[4].sign_text == "} " then
+                eq(4, extmark[2])
+            else
+                assert(false, "unexpected sign text")
+            end
+        end
     end)
 end)