diff --git a/qemu/tests/cfg/x86_cpu_model.cfg b/qemu/tests/cfg/x86_cpu_model.cfg
index 703d171051e9f068ec5fb888e6f0442797de980d..cf2e6b12179ae9a4a730bd12af05ed3d7abbb74e 100644
--- a/qemu/tests/cfg/x86_cpu_model.cfg
+++ b/qemu/tests/cfg/x86_cpu_model.cfg
@@ -27,30 +27,52 @@
         - Icelake-Server:
             flags = "la57 wbnoinvd avx512vbmi umip avx512_vbmi2 gfni vaes vpclmulqdq avx512_bitalg avx512_vpopcntdq clflushopt pdpe1gb clwb avx512f avx512dq avx512bw avx512cd avx512vl"
             model_pattern = "Intel Xeon Processor \(Icelake%s\)"
+        - Icelake-Server-noTSX:
+            flags = "la57 wbnoinvd avx512vbmi umip avx512_vbmi2 gfni vaes vpclmulqdq avx512_bitalg avx512_vpopcntdq clflushopt pdpe1gb clwb avx512f avx512dq avx512bw avx512cd avx512vl"
+            model_pattern = "Intel Xeon Processor \(Icelake%s\)"
+            no_flags = "hle rtm"
         - Icelake-Client:
             flags = "wbnoinvd avx512vbmi umip avx512_vbmi2 gfni vaes vpclmulqdq avx512_bitalg avx512_vpopcntdq"
             model_pattern = "Intel Core Processor \(Icelake%s\)"
+        - Icelake-Client-noTSX:
+            flags = "wbnoinvd avx512vbmi umip avx512_vbmi2 gfni vaes vpclmulqdq avx512_bitalg avx512_vpopcntdq"
+            model_pattern = "Intel Core Processor \(Icelake%s\)"
+            no_flags = "hle rtm"
         - Cascadelake-Server:
             flags = "avx512_vnni clflushopt ibrs ibpb pdpe1gb clwb avx512f avx512dq avx512bw avx512cd avx512vl"
             model_pattern = "Intel Xeon Processor \(Cascadelake%s\)"
+        - Cascadelake-Server-noTSX:
+            flags = "avx512_vnni clflushopt ibrs ibpb pdpe1gb clwb avx512f avx512dq avx512bw avx512cd avx512vl"
+            model_pattern = "Intel Xeon Processor \(Cascadelake%s\)"
+            no_flags = "hle rtm"
         - Skylake-Server:
             flags = "pdpe1gb clwb avx512f avx512dq avx512bw avx512cd avx512vl"
             model_pattern = "Intel Xeon Processor \(Skylake%s\)"
+        - Skylake-Server-noTSX:
+            flags = "pdpe1gb clwb avx512f avx512dq avx512bw avx512cd avx512vl"
+            model_pattern = "Intel Xeon Processor \(Skylake%s\)"
+            no_flags = "hle rtm"
         - Skylake-Client:
             flags = "xsavec xgetbv1"
             model_pattern = "Intel Core Processor \(Skylake%s\)"
+        - Skylake-Client-noTSX:
+            flags = "xsavec xgetbv1"
+            model_pattern = "Intel Core Processor \(Skylake%s\)"
+            no_flags = "hle rtm"
         - Broadwell:
             flags = "adx rdseed 3dnowprefetch smap hle rtm"
             model_pattern = "Intel Core Processor \(Broadwell%s\)"
         - Broadwell-noTSX:
             flags = "adx rdseed 3dnowprefetch smap"
             model_pattern = "Intel Core Processor \(Broadwell, no TSX%s\)"
+            no_flags = "hle rtm"
         - Haswell:
             flags = "vme sse2 sse fxsr mmx clflush pse36 pat cmov mca pge mtrr sep apic cx8 mce pae msr tsc pse de fpu avx xsave aes tsc_deadline_timer fma movbe popcnt x2apic sse4_2 sse4_1 cx16 ssse3 pclmulqdq pni f16c rdrand fsgsbase bmi1 hle avx2 smep bmi2 erms invpcid rtm lm rdtscp nx syscall lahf_lm xsaveopt arat pcid"
             model_pattern = "Intel Core Processor \(Haswell%s\)"
         - Haswell-noTSX:
             flags = "vme sse2 sse fxsr mmx clflush pse36 pat cmov mca pge mtrr sep apic cx8 mce pae msr tsc pse de fpu avx xsave aes tsc_deadline_timer fma movbe popcnt x2apic sse4_2 sse4_1 cx16 ssse3 pclmulqdq pni f16c rdrand fsgsbase bmi1 avx2 smep bmi2 erms invpcid lm rdtscp nx syscall lahf_lm xsaveopt arat pcid"
             model_pattern = "Intel Core Processor \(Haswell, no TSX%s\)"
+            no_flags = "hle rtm"
         - IvyBridge:
             flags = "vme sse2 sse fxsr mmx clflush pse36 pat cmov mca pge mtrr sep apic cx8 mce pae msr tsc pse de fpu avx xsave aes tsc_deadline_timer popcnt x2apic sse4_2 sse4_1 cx16 ssse3 pclmulqdq pni rdrand fsgsbase smep erms lm rdtscp nx syscall lahf_lm xsaveopt arat f16c"
             model_pattern = "Intel Xeon E3-12xx v2 \(Ivy Bridge%s\)"
diff --git a/qemu/tests/x86_cpu_model.py b/qemu/tests/x86_cpu_model.py
index 304353113beae5347be82fd505cd78d46e26a8fd..53f626188a5f01d46577b33242239d934ea6fb8e 100644
--- a/qemu/tests/x86_cpu_model.py
+++ b/qemu/tests/x86_cpu_model.py
@@ -78,6 +78,11 @@ def run(test, params, env):
         missing = [f for f in flags.split() if f not in out]
         if missing:
             test.fail("Flag %s not in guest" % missing)
+        no_flags = params.get("no_flags")
+        if no_flags:
+            err_flags = [f for f in no_flags.split() if f in out]
+            if err_flags:
+                test.fail("Flag %s should not be present in guest" % err_flags)
 
     if params.get("reboot_method"):
         error_context.context("Reboot guest '%s'." % vm.name, logging.info)