diff --git a/pedometer/models/trial.rb b/pedometer/models/trial.rb
index cb1c76e97..1cb44ab92 100644
--- a/pedometer/models/trial.rb
+++ b/pedometer/models/trial.rb
@@ -5,8 +5,8 @@ class Trial
   def initialize(name = nil, method = nil, rate = nil, steps = nil)
     @name   = name.to_s.delete(' ')
     @method = method.to_s.delete(' ')
-    @rate   = Integer(rate.to_s) unless rate.to_s.empty? rescue raise('Invalid rate')
-    @steps  = Integer(steps.to_s) unless steps.to_s.empty? rescue raise('Invalid steps')
+    @rate   = Integer(rate.to_s) unless rate.to_s.empty?
+    @steps  = Integer(steps.to_s) unless steps.to_s.empty?
 
     raise('Invalid rate') if @rate && (@rate <= 0)
     raise('Invalid steps') if @steps && (@steps < 0)
diff --git a/pedometer/test/unit/trial_test.rb b/pedometer/test/unit/trial_test.rb
index b131eb3ec..7165dc72f 100644
--- a/pedometer/test/unit/trial_test.rb
+++ b/pedometer/test/unit/trial_test.rb
@@ -24,12 +24,18 @@ def test_create_with_rate
     assert_equal 100, Trial.new(nil, nil, nil).rate
     assert_equal 100, Trial.new(nil, nil, '').rate
 
-    ['invalid rate', 0, '0', -1, '-1', 2.5, '2.5'].each do |rate|
+    [0, '0', -1, '-1'].each do |rate|
       assert_raise_with_message(RuntimeError, 'Invalid rate') do
         Trial.new(nil, nil, rate)
       end
     end
 
+    ['invalid rate', 2.5, '2.5'].each do |rate|
+      assert_raises(ArgumentError) do
+        Trial.new(nil, nil, rate)
+      end
+    end
+
     assert_equal 1, Trial.new(nil, nil, 1).rate
     assert_equal 1, Trial.new(nil, nil, '1').rate
     assert_equal 100, Trial.new(nil, nil, 100).rate
@@ -41,12 +47,18 @@ def test_create_with_steps
     assert_nil Trial.new(nil, nil, nil, nil).steps
     assert_nil Trial.new(nil, nil, nil, '').steps
 
-    ['invalid steps', -1, '-1', 2.5, '2.5'].each do |steps|
+    [-1, '-1'].each do |steps|
       assert_raise_with_message(RuntimeError, 'Invalid steps') do
         Trial.new(nil, nil, nil, steps)
       end
     end
 
+    ['invalid steps', 2.5, '2.5'].each do |steps|
+      assert_raises(ArgumentError) do
+        Trial.new(nil, nil, nil, steps)
+      end
+    end
+
     assert_equal 0, Trial.new(nil, nil, nil, 0).steps
     assert_equal 0, Trial.new(nil, nil, nil, '0').steps
     assert_equal 1, Trial.new(nil, nil, nil, 1).steps