diff --git a/spec/assertions_spec.lua b/spec/assertions_spec.lua
new file mode 100644
index 0000000..2d4aecb
--- /dev/null
+++ b/spec/assertions_spec.lua
@@ -0,0 +1,9 @@
+describe('assertions', function()
+  local M = require 'telescope'
+
+  it('should correctly print arguments asserions', function()
+    local res, err = pcall(function() assert_equal(1, 2) end)
+    assert(res == false)
+    assert(err[1] == "Assert failed: expected '1' to be equal to '2'")
+  end)
+end)
diff --git a/telescope.lua b/telescope.lua
index 7250653..5758d14 100644
--- a/telescope.lua
+++ b/telescope.lua
@@ -155,7 +155,7 @@ local function make_assertion(name, message, func)
       local a = {}
       local args = {...}
       local nargs = select('#', ...)
-      if nargs > num_vars then        
+      if nargs > num_vars then
         local userErrorMessage = args[num_vars+1]
         if type(userErrorMessage) == "string" then
           return(assertion_message_prefix .. userErrorMessage)
@@ -163,7 +163,7 @@ local function make_assertion(name, message, func)
           error(string.format('assert_%s expected %d arguments but got %d', name, num_vars, #args))
         end
       end
-      for i = 1, nargs do a[i] = tostring(v) end
+      for i = 1, nargs do a[i] = tostring(args[i]) end
       for i = nargs+1, num_vars do a[i] = 'nil' end
       return (assertion_message_prefix .. message):format(unpack(a))
     end
@@ -443,12 +443,12 @@ local function run(contexts, callbacks, test_filter)
     table.sort(ancestors)
     -- this "before" is the test callback passed into the runner
     invoke_callback("before", result)
-    
+
     -- run all the "before" blocks/functions
     for _, a in ipairs(ancestors) do
-      if contexts[a].before then 
+      if contexts[a].before then
         setfenv(contexts[a].before, env)
-        contexts[a].before() 
+        contexts[a].before()
       end
     end
 
@@ -465,9 +465,9 @@ local function run(contexts, callbacks, test_filter)
     -- Run all the "after" blocks/functions
     table.reverse(ancestors)
     for _, a in ipairs(ancestors) do
-      if contexts[a].after then 
+      if contexts[a].after then
         setfenv(contexts[a].after, env)
-        contexts[a].after() 
+        contexts[a].after()
       end
     end