1.18.0: meson fails: Unknown variable "scenario"

+ /usr/bin/meson --buildtype=plain --prefix=/usr --libdir=/usr/lib64 --libexecdir=/usr/libexec --bindir=/usr/bin --sbindir=/usr/sbin --includedir=/usr/include --datadir=/usr/share --mandir=/usr/share/man --infodir=/usr/share/info --localedir=/usr/share/locale --sysconfdir=/etc --localstatedir=/var --sharedstatedir=/var/lib --wrap-mode=nodownload --auto-features=enabled . x86_64-redhat-linux-gnu -D doc=disabled -D validate=disabled -D tests=enabled
The Meson build system
Version: 0.55.1
Source dir: /home/tkloczko/rpmbuild/BUILD/gst-editing-services-1.18.0
Build dir: /home/tkloczko/rpmbuild/BUILD/gst-editing-services-1.18.0/x86_64-redhat-linux-gnu
Build type: native build
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Project name: gst-editing-services
Project version: 1.18.0
Using 'CC' from environment with value: 'gcc'
Using 'CFLAGS' from environment with value: '-O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -fstack-protector-strong -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -flto=auto -flto-partition=none'
Using 'LDFLAGS' from environment with value: '-Wl,-z,relro -Wl,--as-needed  -Wl,-z,now -specs=/usr/lib/rpm/redhat/redhat-hardened-ld -flto=auto -flto-partition=none -fuse-linker-plugin'
Using 'AR' from environment with value: '/usr/bin/gcc-ar'
Using 'CC' from environment with value: 'gcc'
Using 'CFLAGS' from environment with value: '-O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -fstack-protector-strong -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -flto=auto -flto-partition=none'
Using 'LDFLAGS' from environment with value: '-Wl,-z,relro -Wl,--as-needed  -Wl,-z,now -specs=/usr/lib/rpm/redhat/redhat-hardened-ld -flto=auto -flto-partition=none -fuse-linker-plugin'
C compiler for the host machine: gcc (gcc 10.2.1 "gcc (GCC) 10.2.1 20200826 (Red Hat 10.2.1-3)")
C linker for the host machine: gcc ld.bfd 2.35-12
Using 'AR' from environment with value: '/usr/bin/gcc-ar'
Host machine cpu family: x86_64
Host machine cpu: x86_64
Library m found: YES
Compiler for C supports link arguments -Wl,-Bsymbolic-functions: YES
Compiler for C supports arguments -fvisibility=hidden: YES
Compiler for C supports arguments -fno-strict-aliasing: YES
Found pkg-config: /usr/bin/pkg-config (1.7.3)
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency gstreamer-1.0 found: YES 1.18.0
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency gstreamer-pbutils-1.0 found: YES 1.18.0
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency gstreamer-video-1.0 found: YES 1.18.0
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency gstreamer-audio-1.0 found: YES 1.18.0
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency gstreamer-base-1.0 found: YES 1.18.0
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency gstreamer-check-1.0 found: YES 1.18.0
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency gstreamer-controller-1.0 found: YES 1.18.0
Dependency gst-validate-1.0 skipped: feature validate disabled
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency gio-2.0 found: YES 2.65.3
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency libxml-2.0 found: YES 2.9.10
Program g-ir-scanner found: YES
Program python3 found: YES (/usr/bin/python3)
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency python-3.8-embed found: YES 3.8
Message: pylib_loc = /usr/lib64
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency gmodule-2.0 found: YES 2.65.3
Message: python_abi_flags =
Message: pylib_loc = /usr/lib64
Header <gst/gstconfig.h> has symbol "GST_DISABLE_GST_DEBUG" with dependency gstreamer-1.0: YES
Compiler for C supports arguments -Wno-unused -Wunused: YES
Compiler for C supports arguments -Wmissing-declarations: YES
Compiler for C supports arguments -Wmissing-prototypes: YES
Compiler for C supports arguments -Wredundant-decls: YES
Compiler for C supports arguments -Wundef: YES
Compiler for C supports arguments -Wwrite-strings: YES
Compiler for C supports arguments -Wformat: YES
Compiler for C supports arguments -Wformat-security: YES
Compiler for C supports arguments -Winit-self: YES
Compiler for C supports arguments -Wmissing-include-dirs: YES
Compiler for C supports arguments -Waddress: YES
Compiler for C supports arguments -Wno-multichar -Wmultichar: YES
Compiler for C supports arguments -Wdeclaration-after-statement: YES
Compiler for C supports arguments -Wvla: YES
Compiler for C supports arguments -Wpointer-arith: YES
Program python3 found: YES (/usr/bin/python3)
Configuring ges-version.h using configuration
Program flex found: YES
Found pkg-config: /usr/bin/pkg-config (1.7.3)
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Build-time dependency gobject-introspection-1.0 found: YES 1.64.1
Program g_ir_scanner found: YES (/usr/bin/g-ir-scanner)
Program g_ir_compiler found: YES (/usr/bin/g-ir-compiler)
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency bash-completion found: YES 2.11
Configuring gst-editing-services-1.0.pc using configuration
Configuring gst-editing-services-1.0-uninstalled.pc using configuration
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency gstreamer-plugins-base-1.0 found: YES 1.18.0
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency gstreamer-plugins-bad-1.0 found: YES 1.17.90
Program gst-validate-launcher found: YES

tests/check/meson.build:126:8: ERROR: Unknown variable "scenario".

A full log can be found at /home/tkloczko/rpmbuild/BUILD/gst-editing-services-1.18.0/x86_64-redhat-linux-gnu/meson-logs/meson-log.txt
error: Bad exit status from /var/tmp/rpm-tmp.1fyvyG (%build)