diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index bef61e91d5..8de8539a4c 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -43,7 +43,7 @@ jobs:
             buildType: RELEASE
             containerImage: ghcr.io/gafferhq/build/build:2.0.0
             options: .github/workflows/main/options.posix
-            dependenciesURL: https://github.com/GafferHQ/dependencies/releases/download/6.0.0/gafferDependencies-6.0.0-linux.tar.gz
+            dependenciesURL: https://github.com/GafferHQ/dependencies/releases/download/7.0.0/gafferDependencies-7.0.0-linux.tar.gz
             tests: testCore testCorePython testScene testImage testAlembic testUSD testVDB
             publish: true
 
@@ -52,7 +52,7 @@ jobs:
             buildType: DEBUG
             containerImage: ghcr.io/gafferhq/build/build:2.0.0
             options: .github/workflows/main/options.posix
-            dependenciesURL: https://github.com/GafferHQ/dependencies/releases/download/6.0.0/gafferDependencies-6.0.0-linux.tar.gz
+            dependenciesURL: https://github.com/GafferHQ/dependencies/releases/download/7.0.0/gafferDependencies-7.0.0-linux.tar.gz
             tests: testCore testCorePython testScene testImage testAlembic testUSD testVDB
             publish: false
 
@@ -60,7 +60,7 @@ jobs:
             os: windows-2019
             buildType: RELEASE
             options: .github/workflows/main/options.windows
-            dependenciesURL: https://github.com/GafferHQ/dependencies/releases/download/6.0.0/gafferDependencies-6.0.0-windows.zip
+            dependenciesURL: https://github.com/GafferHQ/dependencies/releases/download/7.0.0/gafferDependencies-7.0.0-windows.zip
             tests: testCore testCorePython testScene testImage testAlembic testUSD testVDB
             publish: true
 
@@ -68,7 +68,7 @@ jobs:
             os: windows-2019
             buildType: RELWITHDEBINFO
             options: .github/workflows/main/options.windows
-            dependenciesURL: https://github.com/GafferHQ/dependencies/releases/download/6.0.0/gafferDependencies-6.0.0-windows.zip
+            dependenciesURL: https://github.com/GafferHQ/dependencies/releases/download/7.0.0/gafferDependencies-7.0.0-windows.zip
             tests: testCore testCorePython testScene testImage testAlembic testUSD testVDB
             publish: false
 
diff --git a/test/IECore/CompilerTest.h b/test/IECore/CompilerTest.h
index f9cc552beb..0a103f6709 100644
--- a/test/IECore/CompilerTest.h
+++ b/test/IECore/CompilerTest.h
@@ -39,11 +39,17 @@
 #include "IECore/Export.h"
 
 IECORE_PUSH_DEFAULT_VISIBILITY
+#include "OpenEXR/OpenEXRConfig.h"
+#if OPENEXR_VERSION_MAJOR < 3
 #include "OpenEXR/ImathBox.h"
 #include "OpenEXR/ImathVec.h"
-IECORE_POP_DEFAULT_VISIBILITY
-
 #include "OpenEXR/ImathLineAlgo.h"
+#else
+#include "Imath/ImathBox.h"
+#include "Imath/ImathVec.h"
+#include "Imath/ImathLineAlgo.h"
+#endif
+IECORE_POP_DEFAULT_VISIBILITY
 
 IECORE_PUSH_DEFAULT_VISIBILITY
 #include "boost/test/unit_test.hpp"
diff --git a/test/IECore/DataConversionTest.h b/test/IECore/DataConversionTest.h
index dce6c80aff..ec5ed4a3ed 100644
--- a/test/IECore/DataConversionTest.h
+++ b/test/IECore/DataConversionTest.h
@@ -46,7 +46,6 @@ IECORE_PUSH_DEFAULT_VISIBILITY
 IECORE_POP_DEFAULT_VISIBILITY
 
 #include "boost/random.hpp"
-#include "boost/test/floating_point_comparison.hpp"
 
 #include <cassert>
 
diff --git a/test/IECore/DataConvertTest.h b/test/IECore/DataConvertTest.h
index e03cda9c52..0e4d06d9b9 100644
--- a/test/IECore/DataConvertTest.h
+++ b/test/IECore/DataConvertTest.h
@@ -44,8 +44,6 @@ IECORE_PUSH_DEFAULT_VISIBILITY
 #include "boost/test/unit_test.hpp"
 IECORE_POP_DEFAULT_VISIBILITY
 
-#include "boost/test/floating_point_comparison.hpp"
-
 #include <cassert>
 
 namespace IECore
diff --git a/test/IECore/DespatchTypedDataTest.h b/test/IECore/DespatchTypedDataTest.h
index d47a021eef..1e2d0ba638 100644
--- a/test/IECore/DespatchTypedDataTest.h
+++ b/test/IECore/DespatchTypedDataTest.h
@@ -45,8 +45,6 @@ IECORE_PUSH_DEFAULT_VISIBILITY
 #include "boost/test/unit_test.hpp"
 IECORE_POP_DEFAULT_VISIBILITY
 
-#include "boost/test/floating_point_comparison.hpp"
-
 #include <cassert>
 
 using namespace Imath;
diff --git a/test/IECore/IECoreTest.cpp b/test/IECore/IECoreTest.cpp
index 6b2a16647c..9bbf2e2760 100644
--- a/test/IECore/IECoreTest.cpp
+++ b/test/IECore/IECoreTest.cpp
@@ -35,7 +35,12 @@
 #include "IECore/Export.h"
 
 IECORE_PUSH_DEFAULT_VISIBILITY
+#include "OpenEXR/OpenEXRConfig.h"
+#if OPENEXR_VERSION_MAJOR < 3
 #include "OpenEXR/ImathColor.h"
+#else
+#include "Imath/ImathColor.h"
+#endif
 IECORE_POP_DEFAULT_VISIBILITY
 
 #include <iostream>
diff --git a/test/IECore/Imath.py b/test/IECore/Imath.py
index d783c113c7..f922b700d0 100644
--- a/test/IECore/Imath.py
+++ b/test/IECore/Imath.py
@@ -81,8 +81,8 @@ def testConstructors(self):
 		self.assertEqual(v.x, 1)
 		self.assertEqual(v.y, 1)
 
-		self.assertRaises( RuntimeError, imath.V2f, [ 1 ] )
-		self.assertRaises( RuntimeError, imath.V2f, [ 1, 2, 3 ] )
+		self.assertRaises( Exception, imath.V2f, [ 1 ] )
+		self.assertRaises( Exception, imath.V2f, [ 1, 2, 3 ] )
 
 	def testDimensions(self):
 		"""Test V2f dimensions"""
@@ -291,9 +291,9 @@ def testConstructors(self):
 		self.assertEqual(v.y, 1)
 		self.assertEqual(v.z, 1)
 
-		self.assertRaises( RuntimeError, imath.V3f, [ 1 ] )
-		self.assertRaises( RuntimeError, imath.V3f, [ 1, 2 ] )
-		self.assertRaises( RuntimeError, imath.V3f, [ 1, 2, 3, 4 ] )
+		self.assertRaises( Exception, imath.V3f, [ 1 ] )
+		self.assertRaises( Exception, imath.V3f, [ 1, 2 ] )
+		self.assertRaises( Exception, imath.V3f, [ 1, 2, 3, 4 ] )
 
 	def testDimensions(self):
 		"""Test V3f dimensions"""
diff --git a/test/IECore/IndexedIOTest.h b/test/IECore/IndexedIOTest.h
index 4c895d34ac..e9293da541 100755
--- a/test/IECore/IndexedIOTest.h
+++ b/test/IECore/IndexedIOTest.h
@@ -43,8 +43,6 @@ IECORE_PUSH_DEFAULT_VISIBILITY
 #include "boost/test/unit_test.hpp"
 IECORE_POP_DEFAULT_VISIBILITY
 
-#include "boost/test/floating_point_comparison.hpp"
-
 #include <cassert>
 #include <iostream>
 #include <string>
diff --git a/test/IECore/InternedStringTest.cpp b/test/IECore/InternedStringTest.cpp
index c300f1df7d..98455f351e 100644
--- a/test/IECore/InternedStringTest.cpp
+++ b/test/IECore/InternedStringTest.cpp
@@ -36,7 +36,12 @@
 
 #include "IECore/InternedString.h"
 
+#include "OpenEXR/OpenEXRConfig.h"
+#if OPENEXR_VERSION_MAJOR < 3
 #include "OpenEXR/ImathRandom.h"
+#else
+#include "Imath/ImathRandom.h"
+#endif
 
 #include "boost/lexical_cast.hpp"
 
diff --git a/test/IECore/InterpolatorTest.h b/test/IECore/InterpolatorTest.h
index 7c47d9c7ad..82d6390b0f 100644
--- a/test/IECore/InterpolatorTest.h
+++ b/test/IECore/InterpolatorTest.h
@@ -39,18 +39,23 @@
 #include "IECore/Interpolator.h"
 
 IECORE_PUSH_DEFAULT_VISIBILITY
+#include "OpenEXR/OpenEXRConfig.h"
+#if OPENEXR_VERSION_MAJOR < 3
 #include "OpenEXR/ImathMatrix.h"
+#include "OpenEXR/ImathMatrixAlgo.h"
 #include "OpenEXR/ImathVec.h"
+#else
+#include "Imath/ImathMatrix.h"
+#include "Imath/ImathMatrixAlgo.h"
+#include "Imath/ImathVec.h"
+#endif
 IECORE_POP_DEFAULT_VISIBILITY
 
-#include "OpenEXR/ImathMatrixAlgo.h"
 
 IECORE_PUSH_DEFAULT_VISIBILITY
 #include "boost/test/unit_test.hpp"
 IECORE_POP_DEFAULT_VISIBILITY
 
-#include "boost/test/floating_point_comparison.hpp"
-
 namespace IECore
 {
 void addInterpolatorTest(boost::unit_test::test_suite* test);
diff --git a/test/IECore/KDTreeTest.h b/test/IECore/KDTreeTest.h
index b966e10eca..3dfa96cf15 100644
--- a/test/IECore/KDTreeTest.h
+++ b/test/IECore/KDTreeTest.h
@@ -39,10 +39,15 @@
 #include "IECore/KDTree.h"
 
 IECORE_PUSH_DEFAULT_VISIBILITY
+#include "OpenEXR/OpenEXRConfig.h"
+#if OPENEXR_VERSION_MAJOR < 3
 #include "OpenEXR/ImathVec.h"
-IECORE_POP_DEFAULT_VISIBILITY
-
 #include "OpenEXR/ImathRandom.h"
+#else
+#include "Imath/ImathVec.h"
+#include "Imath/ImathRandom.h"
+#endif
+IECORE_POP_DEFAULT_VISIBILITY
 
 IECORE_PUSH_DEFAULT_VISIBILITY
 #include "boost/test/unit_test.hpp"
diff --git a/test/IECore/LevenbergMarquardtTest.h b/test/IECore/LevenbergMarquardtTest.h
index ba6592bf44..28f3aa671a 100644
--- a/test/IECore/LevenbergMarquardtTest.h
+++ b/test/IECore/LevenbergMarquardtTest.h
@@ -39,11 +39,16 @@
 #include "IECore/LevenbergMarquardt.h"
 
 IECORE_PUSH_DEFAULT_VISIBILITY
+#include "OpenEXR/OpenEXRConfig.h"
+#if OPENEXR_VERSION_MAJOR < 3
+#include "OpenEXR/ImathRandom.h"
 #include "OpenEXR/ImathVec.h"
+#else
+#include "Imath/ImathRandom.h"
+#include "Imath/ImathVec.h"
+#endif
 IECORE_POP_DEFAULT_VISIBILITY
 
-#include "OpenEXR/ImathRandom.h"
-
 IECORE_PUSH_DEFAULT_VISIBILITY
 #include "boost/test/unit_test.hpp"
 IECORE_POP_DEFAULT_VISIBILITY
diff --git a/test/IECore/LevenbergMarquardtTest.inl b/test/IECore/LevenbergMarquardtTest.inl
index 67217dffc8..feaf2f1a0e 100644
--- a/test/IECore/LevenbergMarquardtTest.inl
+++ b/test/IECore/LevenbergMarquardtTest.inl
@@ -32,11 +32,7 @@
 //
 //////////////////////////////////////////////////////////////////////////
 
-#include "OpenEXR/ImathMath.h"
-#include "OpenEXR/ImathRandom.h"
-
 #include "boost/math/tools/rational.hpp"
-#include "boost/test/floating_point_comparison.hpp"
 
 using namespace IECore;
 using namespace Imath;
@@ -63,7 +59,7 @@ class LevenbergMarquardtTestSimple<T>::Fn
 			for ( unsigned i = 1; i <= m_num; i ++ )
 			{
 				/// Distance between our guess and the real function
-				errors->writable()[i-1] = Imath::Math<T>::fabs(
+				errors->writable()[i-1] = std::abs(
 					parameters->readable()[i-1] -
 					i * i
 				);
@@ -137,7 +133,7 @@ class LevenbergMarquardtTestPolynomialFit<T>::Fn
 		)
 		{
 
-			boost::array<T, N> testCoeffs;
+			T testCoeffs[N];
 			for ( unsigned i = 0; i < N; i ++ )
 			{
 				testCoeffs[i] = parameters->readable()[i];
@@ -150,7 +146,7 @@ class LevenbergMarquardtTestPolynomialFit<T>::Fn
 				T v2 = boost::math::tools::evaluate_polynomial<N, T, T>( m_coeffs, (T(i) / m_num - 0.5) * 10.0);
 
 				/// Distance between our guess and the real function
-				errors->writable()[i] = Imath::Math<T>::fabs( v1 - v2 );
+				errors->writable()[i] = std::abs( v1 - v2 );
 			}
 		}
 
@@ -171,7 +167,7 @@ class LevenbergMarquardtTestPolynomialFit<T>::Fn
 	protected :
 
 		unsigned m_num;
-		boost::array<T, N> m_coeffs;
+		T m_coeffs[N];
 };
 
 template<typename T>
diff --git a/test/IECore/ParameterThreadingTest.cpp b/test/IECore/ParameterThreadingTest.cpp
index b66b1e9251..2a8d997438 100644
--- a/test/IECore/ParameterThreadingTest.cpp
+++ b/test/IECore/ParameterThreadingTest.cpp
@@ -42,7 +42,12 @@
 #include "IECore/TypedObjectParameter.h"
 #include "IECore/VectorTypedParameter.h"
 
+#include "OpenEXR/OpenEXRConfig.h"
+#if OPENEXR_VERSION_MAJOR < 3
 #include "OpenEXR/ImathRandom.h"
+#else
+#include "Imath/ImathRandom.h"
+#endif
 
 #include "tbb/parallel_for.h"
 
diff --git a/test/IECore/RadixSortTest.h b/test/IECore/RadixSortTest.h
index 8ff5b3c264..ec34ebb21d 100644
--- a/test/IECore/RadixSortTest.h
+++ b/test/IECore/RadixSortTest.h
@@ -44,7 +44,6 @@ IECORE_PUSH_DEFAULT_VISIBILITY
 IECORE_POP_DEFAULT_VISIBILITY
 
 #include "boost/random.hpp"
-#include "boost/test/floating_point_comparison.hpp"
 
 #include <cassert>
 #include <iostream>
diff --git a/test/IECore/SpaceTransformTest.h b/test/IECore/SpaceTransformTest.h
index 62b7df0539..8ef1fc7a28 100644
--- a/test/IECore/SpaceTransformTest.h
+++ b/test/IECore/SpaceTransformTest.h
@@ -40,17 +40,21 @@
 #include "IECore/SphericalToEuclideanTransform.h"
 
 IECORE_PUSH_DEFAULT_VISIBILITY
+#include "OpenEXR/OpenEXRConfig.h"
+#if OPENEXR_VERSION_MAJOR < 3
 #include "OpenEXR/ImathVec.h"
+#include "OpenEXR/ImathRandom.h"
+#else
+#include "Imath/ImathVec.h"
+#include "Imath/ImathRandom.h"
+#endif
 IECORE_POP_DEFAULT_VISIBILITY
 
-#include "OpenEXR/ImathRandom.h"
 
 IECORE_PUSH_DEFAULT_VISIBILITY
 #include "boost/test/unit_test.hpp"
 IECORE_POP_DEFAULT_VISIBILITY
 
-#include "boost/test/floating_point_comparison.hpp"
-
 #include <cassert>
 
 #include <limits.h>
diff --git a/test/IECore/SweepAndPruneTest.h b/test/IECore/SweepAndPruneTest.h
index d07fc80c21..9cb2e17398 100644
--- a/test/IECore/SweepAndPruneTest.h
+++ b/test/IECore/SweepAndPruneTest.h
@@ -43,8 +43,14 @@
 #include "IECore/VectorTraits.h"
 
 IECORE_PUSH_DEFAULT_VISIBILITY
+#include "OpenEXR/OpenEXRConfig.h"
+#if OPENEXR_VERSION_MAJOR < 3
 #include "OpenEXR/ImathBox.h"
 #include "OpenEXR/ImathVec.h"
+#else
+#include "Imath/ImathBox.h"
+#include "Imath/ImathVec.h"
+#endif
 IECORE_POP_DEFAULT_VISIBILITY
 
 IECORE_PUSH_DEFAULT_VISIBILITY
@@ -52,7 +58,6 @@ IECORE_PUSH_DEFAULT_VISIBILITY
 IECORE_POP_DEFAULT_VISIBILITY
 
 #include "boost/random.hpp"
-#include "boost/test/floating_point_comparison.hpp"
 
 #include <cassert>
 #include <iostream>
diff --git a/test/IECore/TypedDataTest.h b/test/IECore/TypedDataTest.h
index 4412f2264c..04b6f681b0 100644
--- a/test/IECore/TypedDataTest.h
+++ b/test/IECore/TypedDataTest.h
@@ -39,7 +39,11 @@
 #include "IECore/SimpleTypedData.h"
 #include "IECore/VectorTypedData.h"
 
+#if OPENEXR_VERSION_MAJOR < 3
 #include "OpenEXR/ImathRandom.h"
+#else
+#include "Imath/ImathRandom.h"
+#endif
 
 IECORE_PUSH_DEFAULT_VISIBILITY
 #include "boost/test/unit_test.hpp"