diff --git a/tests/file/filetest.cpp b/tests/file/filetest.cpp
index f1876daf94..9692bd3c60 100644
--- a/tests/file/filetest.cpp
+++ b/tests/file/filetest.cpp
@@ -159,7 +159,7 @@ TEST_CASE("wxFile::Special", "[file][linux][special-file]")
     // All files in /sys seem to have size of 4KiB currently, even if they
     // don't have that much data in them.
     wxFile fileSys("/sys/power/state");
-    CHECK( fileSys.Length() == 4096 );
+    CHECK( fileSys.Length() == sysconf(_SC_PAGESIZE) );
     CHECK( fileSys.IsOpened() );
     CHECK( fileSys.ReadAll(&s) );
     CHECK( !s.empty() );
diff --git a/tests/filename/filenametest.cpp b/tests/filename/filenametest.cpp
index 240e95205c..2928b8d4cb 100644
--- a/tests/filename/filenametest.cpp
+++ b/tests/filename/filenametest.cpp
@@ -1060,7 +1060,7 @@ TEST_CASE("wxFileName::GetSizeSpecial", "[filename][linux][special-file]")
     CHECK( size > 0 );
 
     // All files in /sys seem to have size of 4KiB currently.
-    CHECK( wxFileName::GetSize("/sys/power/state") == 4096 );
+    CHECK( wxFileName::GetSize("/sys/power/state") == sysconf(_SC_PAGESIZE) );
 }
 
 #endif // __LINUX__