diff --git a/lib/spack/spack/test/concretize.py b/lib/spack/spack/test/concretize.py
index c2fc3731f0b..80ad390e536 100644
--- a/lib/spack/spack/test/concretize.py
+++ b/lib/spack/spack/test/concretize.py
@@ -2114,7 +2114,6 @@ def test_compiler_match_constraints_when_selected(self):
                         "fc": "/usr/bin/gfortran",
                     },
                     "operating_system": "debian6",
-                    "target": "x86_64",
                     "modules": [],
                 }
             },
@@ -2128,7 +2127,6 @@ def test_compiler_match_constraints_when_selected(self):
                         "fc": "/usr/bin/gfortran",
                     },
                     "operating_system": "debian6",
-                    "target": "x86_64",
                     "modules": [],
                 }
             },
@@ -2150,7 +2148,6 @@ def test_compiler_with_custom_non_numeric_version(self, mock_executable):
                     "spec": "gcc@foo",
                     "paths": {"cc": gcc_path, "cxx": gcc_path, "f77": None, "fc": None},
                     "operating_system": "debian6",
-                    "target": "x86_64",
                     "modules": [],
                 }
             }