diff --git a/lib/sightstone/player_stats_summary.rb b/lib/sightstone/player_stats_summary.rb
index 6441285..ad2f34b 100644
--- a/lib/sightstone/player_stats_summary.rb
+++ b/lib/sightstone/player_stats_summary.rb
@@ -1,7 +1,7 @@
 module Sightstone
 # summary of player statistic
 # @attr [Fixnum] summonerId ID of the summoner
-# @attr [Array<PlayerStatSummary] array of stat summaries for player with given id
+# @attr [Array<PlayerStatSummary] playerStatSummaries array of stat summaries for player with given id
 class PlayerStatsSummaryList
   
   attr_accessor :summonerId, :playerStatSummaries
@@ -17,7 +17,7 @@ end
 
 # stat sumary for a queue
 # @attr [Fixnum] wins number of won game
-# @attr [Fixnum] losses number of lost games
+# @attr [Fixnum] losses number of lost games, can be nil!
 # @attr [Fixnum] modifyDate date of modification as unix date
 # @attr [String] playerStatSummaryType type of the stat (can be: AramUnranked5x5, CoopVsAI, OdinUnranked, RankedPremade3x3, RankedPremade5x5, RankedSolo5x5, RankedTeam3x3, RankedTeam5x5, Unranked, Unranked3x3, OneForAll5x5, FirstBlood1x1, FirstBlood2x2)
 # @attr [Hash<String, Fixnum>] aggregatedStats a hash of all stats (key) and their values.
diff --git a/spec/player_stat_summary_spec.rb b/spec/player_stat_summary_spec.rb
new file mode 100644
index 0000000..283ed2c
--- /dev/null
+++ b/spec/player_stat_summary_spec.rb
@@ -0,0 +1,53 @@
+require 'spec_helper'
+require 'json'
+
+module Sightstone
+
+	describe PlayerStatsSummaryList do
+
+		before :all do
+			json_mockup = JSON.parse('{"playerStatSummaries": [{"playerStatSummaryType": "Unranked3x3","aggregatedStats": {"totalNeutralMinionsKilled": 1854,"totalMinionKills": 4256,"totalChampionKills": 280,"totalAssists": 333,"totalTurretsKilled": 30},"modifyDate": 1395243794000,"wins": 31}], "summonerId": 30447079}')
+			@pssl = PlayerStatsSummaryList.new(json_mockup)
+		end
+
+		describe "#new" do
+			it "should init player stat summary list object" do
+				@pssl.should be_instance_of PlayerStatsSummaryList
+			end
+
+			it "should init with correct params" do
+				@pssl.summonerId.should be_instance_of Fixnum
+				@pssl.playerStatSummaries.should be_instance_of Array
+				@pssl.playerStatSummaries.each do |stat|
+					stat.should be_instance_of PlayerStatSummary
+				end
+			end
+		end
+	end
+
+	describe PlayerStatSummary do
+		before @all do
+			json_mockup = JSON.parse('{"playerStatSummaryType": "Unranked3x3","aggregatedStats": {"totalNeutralMinionsKilled": 1854,"totalMinionKills": 4256,"totalChampionKills": 280,"totalAssists": 333,"totalTurretsKilled": 30},"modifyDate": 1395243794000,"wins": 31}')
+			@pss = PlayerStatSummary.new(json_mockup)
+		end
+
+		describe "#new" do
+			it "should init player stat summary object" do
+				@pss.should be_instance_of PlayerStatSummary
+			end
+
+			it "should init with correct params" do
+				@pss.losses.should satisfy { |l| l.nil? or l.is_a?(Fixnum)}
+				@pss.wins.should be_instance_of Fixnum
+				@pss.modifyDate.should be_instance_of Fixnum
+				@pss.playerStatSummaryType.should be_instance_of String
+				@pss.aggregatedStats.should be_instance_of Hash
+				@pss.aggregatedStats.each do |key, stat|
+					key.should be_instance_of String
+					stat.should be_instance_of Fixnum
+				end
+			end
+		end
+	end
+
+end
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