diff --git a/tests/FSharpx.DataStructures.Tests/RoseTreeTest.fs b/tests/FSharpx.DataStructures.Tests/RoseTreeTest.fs
index 331adad1..144f42c1 100644
--- a/tests/FSharpx.DataStructures.Tests/RoseTreeTest.fs
+++ b/tests/FSharpx.DataStructures.Tests/RoseTreeTest.fs
@@ -1,6 +1,7 @@
 module FSharpx.DataStructures.Tests.RoseTreeTest
 
 open FSharpx
+open FSharpx.Collections
 open FSharpx.DataStructures
 open NUnit.Framework
 
diff --git a/tests/FSharpx.Tests/BinaryIterateeTest.fs b/tests/FSharpx.Tests/BinaryIterateeTest.fs
index 484e2cc4..0c1cc206 100644
--- a/tests/FSharpx.Tests/BinaryIterateeTest.fs
+++ b/tests/FSharpx.Tests/BinaryIterateeTest.fs
@@ -2,6 +2,7 @@ module FSharpx.Tests.BinaryIterateeTest
 
 open System
 open FSharpx
+open FSharpx.Collections
 open FSharpx.Collections.ByteString
 open FSharpx.Iteratee
 open FSharpx.Iteratee.Binary
diff --git a/tests/FSharpx.Tests/ByteStringTest.fs b/tests/FSharpx.Tests/ByteStringTest.fs
index 1e83c6a0..b9ff422e 100644
--- a/tests/FSharpx.Tests/ByteStringTest.fs
+++ b/tests/FSharpx.Tests/ByteStringTest.fs
@@ -2,6 +2,7 @@
 
 open System
 open FSharpx
+open FSharpx.Collections
 open FSharpx.Collections.ByteString
 open NUnit.Framework
 open FsUnit
diff --git a/tests/FSharpx.Tests/FsCheckProperties.fs b/tests/FSharpx.Tests/FsCheckProperties.fs
index f6ca771d..09afb4ca 100644
--- a/tests/FSharpx.Tests/FsCheckProperties.fs
+++ b/tests/FSharpx.Tests/FsCheckProperties.fs
@@ -1,6 +1,7 @@
 module FSharpx.Tests.Properties
 
 open FSharpx
+open FSharpx.Collections
 open FsCheck
 open FsCheck.NUnit
 
diff --git a/tests/FSharpx.Tests/LensExample.fs b/tests/FSharpx.Tests/LensExample.fs
index 0f237896..a96ea771 100644
--- a/tests/FSharpx.Tests/LensExample.fs
+++ b/tests/FSharpx.Tests/LensExample.fs
@@ -3,6 +3,7 @@
 // http://stackoverflow.com/questions/8179485/updating-nested-immutable-data-structures
 
 open FSharpx
+open FSharpx.Collections
 
 type Monster = {
     Awake: bool
diff --git a/tests/FSharpx.Tests/MonoidTests.fs b/tests/FSharpx.Tests/MonoidTests.fs
index 8d51f648..7dd83fb1 100644
--- a/tests/FSharpx.Tests/MonoidTests.fs
+++ b/tests/FSharpx.Tests/MonoidTests.fs
@@ -4,6 +4,7 @@ open NUnit.Framework
 open FsCheck
 open FsCheck.NUnit
 open FSharpx
+open FSharpx.Collections
 open FSharpx.Tests.Properties
 open FSharpx.Monoid
 
diff --git a/tests/FSharpx.Tests/ValidationExample.fs b/tests/FSharpx.Tests/ValidationExample.fs
index d1a5913a..23ab4c02 100644
--- a/tests/FSharpx.Tests/ValidationExample.fs
+++ b/tests/FSharpx.Tests/ValidationExample.fs
@@ -6,6 +6,7 @@ open NUnit.Framework
 open FsUnit
 
 open FSharpx
+open FSharpx.Collections
 open FSharpx.Choice
 open FSharpx.Validation
 
diff --git a/tests/FSharpx.Tests/ValidationTests.fs b/tests/FSharpx.Tests/ValidationTests.fs
index f559ccce..f279d2ed 100644
--- a/tests/FSharpx.Tests/ValidationTests.fs
+++ b/tests/FSharpx.Tests/ValidationTests.fs
@@ -4,6 +4,7 @@ open System
 open FsUnit
 open Microsoft.FSharp.Core
 open FSharpx
+open FSharpx.Collections
 open FSharpx.CSharpTests
 open FSharpx.Choice
 open FSharpx.Validation