diff --git a/Sofa/framework/Helper/test/accessor/ReadAccessor.cpp b/Sofa/framework/Helper/test/accessor/ReadAccessor.cpp
index dc370da123a..07ed67193fd 100644
--- a/Sofa/framework/Helper/test/accessor/ReadAccessor.cpp
+++ b/Sofa/framework/Helper/test/accessor/ReadAccessor.cpp
@@ -23,6 +23,9 @@
 
 #include <sofa/helper/accessor.h>
 #include <sofa/type/vector.h>
+#include <sofa/type/fixed_array.h>
+#include <sofa/type/Vec.h>
+#include <sofa/type/Mat.h>
 
 namespace sofa
 {
@@ -46,8 +49,31 @@ TEST(ReadAccessor, VectorTypes)
     EXPECT_EQ(accessor.size(), vector.size());
     EXPECT_EQ(accessor.empty(), vector.empty());
     EXPECT_EQ(accessor.begin(), vector.begin());
-    EXPECT_EQ(accessor.end(), vector.end());
+    EXPECT_EQ(accessor.end(), vector.end());    
 }
 
+template <typename FixedArrayType>
+class ReadAccessorFixedArray_test : public ::testing::Test
+{
+public:
+    ReadAccessorFixedArray_test() = default;
+    
+    const FixedArrayType m_array{};
+};
+
+using FixedArrayTypes = ::testing::Types <
+    sofa::type::fixed_array<double, 5>, sofa::type::Vec < 2, float >, sofa::type::Mat<3, 3>>;
+
+TYPED_TEST_SUITE(ReadAccessorFixedArray_test, FixedArrayTypes);
+
+TYPED_TEST(ReadAccessorFixedArray_test, tests )
+{
+    sofa::helper::ReadAccessor accessor(this->m_array);
+    
+    EXPECT_EQ(TypeParam::static_size, accessor.size());
+    EXPECT_EQ(this->m_array.size(), accessor.size());
+    EXPECT_EQ(accessor.begin(), this->m_array.begin());
+    EXPECT_EQ(accessor.end(), this->m_array.end());
+}
 
 }
diff --git a/Sofa/framework/Helper/test/accessor/WriteAccessor.cpp b/Sofa/framework/Helper/test/accessor/WriteAccessor.cpp
index 9208d271ee1..a2b19f23303 100644
--- a/Sofa/framework/Helper/test/accessor/WriteAccessor.cpp
+++ b/Sofa/framework/Helper/test/accessor/WriteAccessor.cpp
@@ -23,6 +23,9 @@
 
 #include <sofa/helper/accessor.h>
 #include <sofa/type/vector.h>
+#include <sofa/type/fixed_array.h>
+#include <sofa/type/Vec.h>
+#include <sofa/type/Mat.h>
 #include <string>
 
 namespace sofa
@@ -104,5 +107,45 @@ TEST(WriteAccessor, VectorTypes)
     EXPECT_EQ(pairVector.front().aString, std::string{"hello"});
 }
 
+template <typename FixedArrayType>
+class WriteAccessorFixedArray_test : public ::testing::Test
+{
+public:
+    WriteAccessorFixedArray_test() = default;
+    
+    FixedArrayType m_array{};
+};
+
+using FixedArrayTypes = ::testing::Types <
+    sofa::type::fixed_array<double, 5>, sofa::type::Vec < 2, float >,  sofa::type::Mat<3, 3>>;
+
+TYPED_TEST_SUITE(WriteAccessorFixedArray_test, FixedArrayTypes);
+
+TYPED_TEST(WriteAccessorFixedArray_test, tests )
+{
+    sofa::helper::WriteAccessor accessor(this->m_array);
+    
+    EXPECT_EQ(TypeParam::static_size, accessor.size());
+    EXPECT_EQ(this->m_array.size(), accessor.size());
+    EXPECT_EQ(accessor.begin(), this->m_array.begin());
+    EXPECT_EQ(accessor.end(), this->m_array.end());
+    
+    auto copy = this->m_array;
+    if constexpr (std::is_scalar_v<typename std::decay<decltype(this->m_array[0])>::type>)
+    {
+        constexpr auto increment = static_cast<typename std::decay<decltype(this->m_array[0])>::type>(1);
+        for(auto& v : accessor)
+        {
+            v = v + increment;
+        }
+        
+        for(typename TypeParam::size_type i = 0 ; i < accessor.size() ; i++)
+        {
+            EXPECT_EQ(accessor[i], copy[i]+increment);
+        }
+    }
+    
+}
+
 
 }