/usr/share/gobject-introspection-1.0/tests/ is in gobject-introspection 1.50.0-1+b1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/gobject-introspection-1.0/tests/annotation.c
/usr/share/gobject-introspection-1.0/tests/annotation.h
/usr/share/gobject-introspection-1.0/tests/drawable.c
/usr/share/gobject-introspection-1.0/tests/drawable.h
/usr/share/gobject-introspection-1.0/tests/everything.c
/usr/share/gobject-introspection-1.0/tests/everything.h
/usr/share/gobject-introspection-1.0/tests/foo.c
/usr/share/gobject-introspection-1.0/tests/foo.h
/usr/share/gobject-introspection-1.0/tests/gimarshallingtests.c
/usr/share/gobject-introspection-1.0/tests/gimarshallingtests.h
/usr/share/gobject-introspection-1.0/tests/gitestmacros.h
/usr/share/gobject-introspection-1.0/tests/regress.c
/usr/share/gobject-introspection-1.0/tests/regress.h
/usr/share/gobject-introspection-1.0/tests/utility.c
/usr/share/gobject-introspection-1.0/tests/utility.h
/usr/share/gobject-introspection-1.0/tests/warnlib.c
/usr/share/gobject-introspection-1.0/tests/warnlib.h