diff --git a/test/te_hubbard_chain_interall.sh b/test/te_hubbard_chain_interall.sh
index 41086348..ef56e09e 100755
--- a/test/te_hubbard_chain_interall.sh
+++ b/test/te_hubbard_chain_interall.sh
@@ -2,7 +2,7 @@
 
 mkdir -p te_hubbard_chain_interall/
 cd te_hubbard_chain_interall
-python "$1/test/testTECalc.py" -p "../../src/HPhi" -mpi "${MPIRUN}"
+python3 "$1/test/testTECalc.py" -p "../../src/HPhi" -mpi "${MPIRUN}"
 
 # Check value: flct
 cat > reference.dat <<EOF
diff --git a/test/te_hubbard_chain_interall_diagonal.sh b/test/te_hubbard_chain_interall_diagonal.sh
index 85cdc2fe..9b399cf6 100755
--- a/test/te_hubbard_chain_interall_diagonal.sh
+++ b/test/te_hubbard_chain_interall_diagonal.sh
@@ -2,7 +2,7 @@
 
 mkdir -p te_hubbard_chain_interall_diagonal/
 cd te_hubbard_chain_interall_diagonal
-python "$1/test/testTECalc.py" -p "../../src/HPhi" -mpi "${MPIRUN}" -t "Diagonal"
+python3 "$1/test/testTECalc.py" -p "../../src/HPhi" -mpi "${MPIRUN}" -t "Diagonal"
 
 # Check value: flct
 cat > reference.dat <<EOF
diff --git a/test/te_kondo_chain_interall.sh b/test/te_kondo_chain_interall.sh
index 5d03bd8c..e9aa0bb6 100755
--- a/test/te_kondo_chain_interall.sh
+++ b/test/te_kondo_chain_interall.sh
@@ -2,7 +2,7 @@
 
 mkdir -p te_kondo_chain_interall/
 cd te_kondo_chain_interall
-python "$1/test/testTECalc.py" -p "../../src/HPhi" -mpi "${MPIRUN}" -m "Kondo"
+python3 "$1/test/testTECalc.py" -p "../../src/HPhi" -mpi "${MPIRUN}" -m "Kondo"
 
 # Check value: flct
 cat > reference.dat <<EOF
diff --git a/test/te_spin_chain_interall.sh b/test/te_spin_chain_interall.sh
index ef18870a..ca12d768 100755
--- a/test/te_spin_chain_interall.sh
+++ b/test/te_spin_chain_interall.sh
@@ -2,7 +2,7 @@
 
 mkdir -p te_spin_chain_interall/
 cd te_spin_chain_interall
-python "$1/test/testTECalc.py" -p "../../src/HPhi" -mpi "${MPIRUN}" -m "Spin"
+python3 "$1/test/testTECalc.py" -p "../../src/HPhi" -mpi "${MPIRUN}" -m "Spin"
 
 # Check value: SS
 cat > reference.dat <<EOF