diff --git a/unitTests/test_image_int.cpp b/unitTests/test_image_int.cpp
index 14fb9b56..c9d6ba18 100644
--- a/unitTests/test_image_int.cpp
+++ b/unitTests/test_image_int.cpp
@@ -8,7 +8,7 @@ using namespace Exiv2::Internal;
 using Exiv2::makeSlice;
 using Exiv2::Slice;
 
-static const unsigned char buf[10] = {'a', 'b', 'c', 1, 4, 0, 'e', 136, 0, 'a'};
+static const unsigned char b[10] = {'a', 'b', 'c', 1, 4, 0, 'e', 136, 0, 'a'};
 
 template <typename T>
 void checkBinaryToString(const Exiv2::Slice<T> sl, const char* expectedOutput) {
@@ -23,25 +23,25 @@ void checkBinaryToString(const Exiv2::Slice<T> sl, const char* expectedOutput) {
 
 TEST(binaryToString, zeroStart) {
   // a, b, c are printable, 1 & 4 are not => '.', 0 at last position => skipped
-  checkBinaryToString(makeSlice(buf, 0, 6), "abc..");
+  checkBinaryToString(makeSlice(b, 0, 6), "abc..");
 
   // same as previous, but now last element is not ignored since it is not 0
-  checkBinaryToString(makeSlice(buf, 0, 5), "abc..");
+  checkBinaryToString(makeSlice(b, 0, 5), "abc..");
 
   // same as first, only now the 0 & 136 are converted to '.'
-  checkBinaryToString(makeSlice(buf, 0, 8), "abc...e.");
+  checkBinaryToString(makeSlice(b, 0, 8), "abc...e.");
 
   // should result in the same as previously, as trailing zero is ignored
-  checkBinaryToString(makeSlice(buf, 0, 9), "abc...e.");
+  checkBinaryToString(makeSlice(b, 0, 9), "abc...e.");
 
   // ensure that the function does not overread when last element != 0
-  checkBinaryToString(makeSlice(buf, 0, sizeof(buf)), "abc...e..a");
+  checkBinaryToString(makeSlice(b, 0, sizeof(b)), "abc...e..a");
 }
 
 TEST(binaryToString, nonZeroStart) {
   // start @ index 1, read 6 characters (until e)
-  checkBinaryToString(makeSlice(buf, 1, 7), "bc...e");
+  checkBinaryToString(makeSlice(b, 1, 7), "bc...e");
 
   // start @ index 3, read until end
-  checkBinaryToString(makeSlice(buf, 3, sizeof(buf)), "...e..a");
+  checkBinaryToString(makeSlice(b, 3, sizeof(b)), "...e..a");
 }