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diff --git a/ext/librethinkdbxx/test/upstream/math_logic/add.yaml b/ext/librethinkdbxx/test/upstream/math_logic/add.yaml
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+desc: Tests for basic usage of the add operation
+tests:
+    - cd: r.add(1, 1)
+      ot: 2
+    
+    - js: r(1).add(1)
+      py:
+        - r.expr(1) + 1
+        - 1 + r.expr(1)
+        - r.expr(1).add(1)
+      rb:
+        - r(1) + 1
+        - r(1).add(1)
+      ot: 2
+
+    - py: r.expr(-1) + 1
+      js: r(-1).add(1)
+      rb: (r -1) + 1
+      ot: 0
+
+    - py: r.expr(1.75) + 8.5
+      js: r(1.75).add(8.5)
+      rb: (r 1.75) + 8.5
+      ot: 10.25
+
+    # Add is polymorphic on strings
+    - py: r.expr('') + ''
+      js: r('').add('')
+      rb: (r '') + ''
+      ot: ''
+
+    - py: r.expr('abc') + 'def'
+      js: r('abc').add('def')
+      rb: (r 'abc') + 'def'
+      ot: 'abcdef'
+
+    # Add is polymorphic on arrays
+    - cd: r.expr([1,2]) + [3] + [4,5] + [6,7,8]
+      js: r([1,2]).add([3]).add([4,5]).add([6,7,8])
+      ot: [1,2,3,4,5,6,7,8]
+
+    # All arithmetic operations (except mod) actually support arbitrary arguments
+    # but this feature can't be accessed in Python because it's operators are binary
+    - js: r(1).add(2,3,4,5)
+      ot: 15
+
+    - js: r('a').add('b', 'c', 'd')
+      ot: 'abcd'
+
+    # Type errors
+    - cd: r(1).add('a')
+      py: r.expr(1) + 'a'
+      rb: r(1) + 'a'
+      ot: err("ReqlQueryLogicError", "Expected type NUMBER but found STRING.", [1])
+
+    - cd: r('a').add(1)
+      py: r.expr('a') + 1
+      rb: r('a') + 1
+      ot: err("ReqlQueryLogicError", "Expected type STRING but found NUMBER.", [1])
+
+    - cd: r([]).add(1)
+      py: r.expr([]) + 1
+      rb: r([]) + 1
+      ot: err("ReqlQueryLogicError", "Expected type ARRAY but found NUMBER.", [1])
+