General

Meeting Stones: To use any Meeting Stone, it is only required that the character’s minimum level be 15. There is no maximum character level requirement for any Meeting Stone.

PvP

Arenas

• All abilities that have base cooldowns of 10 minutes or longer cannot be used in Arenas, down from 15 minutes.

Battlegrounds

• Battleground Experience: Battleground experience gained is now based on the level of the player gaining experience, rather than the highest possible player level in that Battleground.

• All level 71-80 Battleground daily quests will now award 25 Arena points in addition to their current rewards.

Wintergrasp

• You must now have the following ranks to build or pilot siege vehicles:

+ Rank 2: Build/pilot Catapults.
+ Rank 3: Build/pilot Demolishers.
+ Rank 3: Build/pilot Siege Engines.

Death Knight

• Night of the Dead: Now reduces the damage your pet takes from area-of-effect damage by 45/90%, but no longer applies to area-of-effect damage caused by other players. In addition, this talent now reduces the cooldown of Army of the Dead by 2/4 minutes, down from 5/10 minutes.

• Raise Ally: The cooldown on this ability has been reduced from 15 minutes to 10 minutes. Cannot be used in Arenas.

• Rune Strike: Threat generated by this ability increased by approximately 17%.

Mage

• Fingers of Frost: This talent now triggers immediately on casting a spell rather than being delayed until the spell strikes the target.

Priest

• Divine Hymn: The cooldown on this spell has been reduced to 8 minutes, down from 10 minutes.

Rogue

• Preparation: The cooldown on this ability has been reduced to 8 minutes, down from 10 minutes.

• Filthy Tricks: The cooldown reduction this talent provides for Preparation has been reduced to 1.5/3 minutes, down from 2.5/5 minutes.

Paladin

• Divine Intervention: Cooldown on this ability has been reduced from 20 minutes to 10 minutes. Cannot be used in Arenas.

• Flash of Light: This spell no longer causes a heal-over-time effect unless the player has the Infusion of Light talent.

• Lay on Hands: This ability now places Forbearance on the target and cannot be used on a target with Forbearance.

Holy

• Infusion of Light: This talent now causes the paladin’s Flash of Light spells to heal the target for 50/100% of the Flash of Light healing amount over 12 seconds.

Protection

• Aura Mastery: This effect of this talent has been reduced in duration to 6 seconds.

Shaman

• Earth Elemental Totem: The cooldown for this totem has been reduced from 20 minutes to 10 minutes. Cannot be used in Arenas.

• Fire Elemental Totem: The cooldown for this totem has been reduced from 20 minutes to 10 minutes. Cannot be used in Arenas.

Warlock

• Inferno: The cooldown on this summoning spell has been reduced from 20 minutes to 10 minutes. Cannot be used in Arenas.

User Interface

• Group Disenchanting Option: In addition to rolling Need or Greed on items, players now have the option to elect for an item to be disenchanted if an enchanter of the appropriate skill level is in the group. Disenchant works exactly like Greed except if a player wins the Greed roll, they will receive the disenchanted materials instead. Players who choose Need will always win the item and will always beat those that choose Greed or Disenchant.

The latest test realm patch notes can always be found at http://www.worldofwarcraft.com/patchnotes/test-realm-patchnotes.html

(Source)