diff --git a/env/rhel7/x86_64/users/stable/spack.yaml b/env/rhel7/x86_64/users/stable/spack.yaml
index 9243e33..469c9c6 100644
--- a/env/rhel7/x86_64/users/stable/spack.yaml
+++ b/env/rhel7/x86_64/users/stable/spack.yaml
@@ -6,8 +6,6 @@ spack:
     - $spack/spack-psi/env/rhel7/x86_64/sysconfigs/compilers.yaml
   include_concrete:
     - /afs/psi.ch/sys/spack/system/spack-psi/env/rhel7/x86_64/admin/stable
-  mirrors:
-    local_psi: file:///afs/psi.ch/software/spack/testing
   specs: []
   upstreams:
     stable:
diff --git a/env/rhel7/x86_64/users/unstable/spack.yaml b/env/rhel7/x86_64/users/unstable/spack.yaml
index 483420b..747255b 100644
--- a/env/rhel7/x86_64/users/unstable/spack.yaml
+++ b/env/rhel7/x86_64/users/unstable/spack.yaml
@@ -7,8 +7,6 @@ spack:
   include_concrete:
     - /afs/psi.ch/sys/spack/system/spack-psi/env/rhel7/x86_64/admin/stable
     - /afs/psi.ch/sys/spack/system/spack-psi/env/rhel7/x86_64/admin/unstable
-  mirrors:
-    local_psi: file:///afs/psi.ch/software/spack/testing
   specs: []
   upstreams:
     stable:
diff --git a/env/sles15/x86_64/users/stable/spack.yaml b/env/sles15/x86_64/users/stable/spack.yaml
index aa2d223..6872692 100644
--- a/env/sles15/x86_64/users/stable/spack.yaml
+++ b/env/sles15/x86_64/users/stable/spack.yaml
@@ -6,8 +6,6 @@ spack:
     - $spack/spack-psi/env/sles15/x86_64/sysconfigs/compilers.yaml
   include_concrete:
     - /afs/psi.ch/sys/spack/system/spack-psi/env/sles15/x86_64/admin/stable
-  mirrors:
-    local_psi: file:///afs/psi.ch/software/spack/testing
   specs: []
   upstreams:
     stable:
diff --git a/env/sles15/x86_64/users/unstable/spack.yaml b/env/sles15/x86_64/users/unstable/spack.yaml
index 58c42f0..d4f1123 100644
--- a/env/sles15/x86_64/users/unstable/spack.yaml
+++ b/env/sles15/x86_64/users/unstable/spack.yaml
@@ -7,8 +7,6 @@ spack:
   include_concrete:
     - /afs/psi.ch/sys/spack/system/spack-psi/env/sles15/x86_64/admin/stable
     - /afs/psi.ch/sys/spack/system/spack-psi/env/sles15/x86_64/admin/unstable
-  mirrors:
-    local_psi: file:///afs/psi.ch/software/spack/testing
   specs: []
   upstreams:
     stable: