diff --git a/test/TC_FXJPGImage.rb b/test/TC_FXJPGImage.rb
index 6224a0b1e62cd89b70aac8dd52e6443fe670d559..5d4cee433fed3b03fb46a72972603ae2ceb37926 100644
--- a/test/TC_FXJPGImage.rb
+++ b/test/TC_FXJPGImage.rb
@@ -17,7 +17,6 @@ class TC_FXJPGImage < Fox::TestCase
     count = 0
     th = Thread.new do
       loop do
-        sleep 0.001
         count += 1
       end
     end
@@ -30,7 +29,7 @@ class TC_FXJPGImage < Fox::TestCase
       outfile.takeBuffer
     end
 
-    assert_operator(count, :>=, 10)
+    assert_operator(count, :>=, 1000000)
     assert_operator(jpeg_data.bytesize, :>=, 1000)
 
     count = 0
@@ -43,6 +42,6 @@ class TC_FXJPGImage < Fox::TestCase
 
     assert_equal 4000, img.width
     assert_equal 3000, img.height
-    assert_operator(count, :>=, 10)
+    assert_operator(count, :>=, 1000000)
   end
 end