diff --git a/test/runners/fibo_recursice.cr b/test/runners/fibo_recursice.cr
deleted file mode 100644
index 855f0b8f..00000000
--- a/test/runners/fibo_recursice.cr
+++ /dev/null
@@ -1,6 +0,0 @@
-def fibonacci_r( n )
-    return  n  if n <= 1 
-    fibonacci_r( n - 1 ) + fibonacci_r( n - 2 )
-end 
-
-puts fibonacci( 10 )
diff --git a/test/runners/fibo_recursice.rb b/test/runners/fibo_recursice.rb
new file mode 100644
index 00000000..780ff5da
--- /dev/null
+++ b/test/runners/fibo_recursice.rb
@@ -0,0 +1,8 @@
+def fibonaccir( n , put )
+    return  n  if n <= 1 
+    res = fibonaccir( n - 1 , put ) + fibonaccir( n - 2 , false )
+    puts(res) if put
+    res
+end 
+
+fibonaccir( 10 , true)
diff --git a/test/runners/fibo_times.cr b/test/runners/fibo_times.cr
deleted file mode 100644
index e548a0a1..00000000
--- a/test/runners/fibo_times.cr
+++ /dev/null
@@ -1,9 +0,0 @@
-def fibonacci_t(n)
-  a,b = 0,1
-  n.times do
-    printf("%d\n", a)
-    a,b = b,a+b
-  end
-end
-
-puts fibonacci_t( 10 )
diff --git a/test/runners/fibo_times.rb b/test/runners/fibo_times.rb
new file mode 100644
index 00000000..da58861a
--- /dev/null
+++ b/test/runners/fibo_times.rb
@@ -0,0 +1,12 @@
+def fibonaccit(n)
+  a = 0 
+  b = 1
+  (n-1).times do
+    tmp = a
+    a = b
+    b = tmp + b
+    puts b
+  end
+end
+
+fibonaccit( 10 )
diff --git a/test/runners/foo.rb b/test/runners/foo.rb
new file mode 100644
index 00000000..94170287
--- /dev/null
+++ b/test/runners/foo.rb
@@ -0,0 +1,3 @@
+def foo(x) 
+  a = 5
+end
\ No newline at end of file
diff --git a/test/test_runner.rb b/test/test_runner.rb
index 9b71ed26..de6d28aa 100644
--- a/test/test_runner.rb
+++ b/test/test_runner.rb
@@ -5,7 +5,7 @@ class TestRunner < MiniTest::Test
   # this creates test methods dynamically , one for each file in runners directory
   def self.runnable_methods
     methods = []
-    Dir[File.join(File.dirname(__FILE__) , "runners" , "*.cr")].each do |file|
+    Dir[File.join(File.dirname(__FILE__) , "runners" , "*.rb")].each do |file|
       meth =  File.basename(file).split(".").first
       name = "test_#{meth}"
       methods << name