diff --git a/test_regress/t/t_constraint_nosolver_bad.out b/test_regress/t/t_constraint_nosolver_bad.out
deleted file mode 100644
index 2f4435757..000000000
--- a/test_regress/t/t_constraint_nosolver_bad.out
+++ /dev/null
@@ -1,7 +0,0 @@
-Process::open: execvp(someimaginarysolver): No such file or directory
-%Warning: Subprocess command `someimaginarysolver' failed: exit status 127
-%Warning: Unable to communicate with SAT solver, please check its installation or specify a different one in VERILATOR_SOLVER environment variable.
- ... Tried: $ someimaginarysolver
-
-%Error: t/t_constraint.v:25: Verilog $stop
-Aborting...
diff --git a/test_regress/t/t_constraint_nosolver_bad.py b/test_regress/t/t_constraint_nosolver_bad.py
index 118aafe1b..69c260d6a 100755
--- a/test_regress/t/t_constraint_nosolver_bad.py
+++ b/test_regress/t/t_constraint_nosolver_bad.py
@@ -14,8 +14,9 @@ test.top_filename = "t/t_constraint.v"
 
 test.compile()
 
-test.execute(run_env='VERILATOR_SOLVER=someimaginarysolver',
-             fails=True,
-             expect_filename=test.golden_filename)
+test.execute(run_env='VERILATOR_SOLVER=someimaginarysolver', fails=True)
+
+# Not using golden file, as may get spurious pipe messages, see issue #6273
+test.file_grep(test.run_log_filename, r'Unable to communicate with SAT solver')
 
 test.passes()