diff --git a/tests/unit/builder-dockerfile.bats b/tests/unit/builder-dockerfile.bats
index c64d5bc36..73c5b9c99 100644
--- a/tests/unit/builder-dockerfile.bats
+++ b/tests/unit/builder-dockerfile.bats
@@ -152,7 +152,7 @@ EOF
   echo "status: $status"
   assert_success
 
-  run /bin/bash -c "dokku run $TEST_APP python task.py test"
+  run /bin/bash -c "dokku run $TEST_APP python3 task.py test"
   echo "output: $output"
   echo "status: $status"
   assert_success
diff --git a/tests/unit/builder-herokuish.bats b/tests/unit/builder-herokuish.bats
index fabc7c4a5..fb1536f91 100644
--- a/tests/unit/builder-herokuish.bats
+++ b/tests/unit/builder-herokuish.bats
@@ -105,7 +105,7 @@ teardown() {
   echo "status: $status"
   assert_success
 
-  run /bin/bash -c "dokku run $TEST_APP python task.py test"
+  run /bin/bash -c "dokku run $TEST_APP python3 task.py test"
   echo "output: $output"
   echo "status: $status"
   assert_success
diff --git a/tests/unit/builder-nixpacks.bats b/tests/unit/builder-nixpacks.bats
index fa765fac3..e66a6147a 100644
--- a/tests/unit/builder-nixpacks.bats
+++ b/tests/unit/builder-nixpacks.bats
@@ -62,7 +62,7 @@ teardown() {
   assert_output_contains 'load build definition from Dockerfile' -1
   assert_output_contains "SECRET_KEY: fjdkslafjdk"
 
-  run /bin/bash -c "dokku run $TEST_APP python task.py test"
+  run /bin/bash -c "dokku run $TEST_APP python3 task.py test"
   echo "output: $output"
   echo "status: $status"
   assert_success
diff --git a/tests/unit/builder-pack.bats b/tests/unit/builder-pack.bats
index cf052a926..55c662149 100644
--- a/tests/unit/builder-pack.bats
+++ b/tests/unit/builder-pack.bats
@@ -95,7 +95,7 @@ teardown() {
   assert_output_contains 'Building with buildpack 1' 0
   assert_output_contains 'Installing dependencies using pip'
 
-  run /bin/bash -c "dokku run $TEST_APP python task.py test"
+  run /bin/bash -c "dokku run $TEST_APP python3 task.py test"
   echo "output: $output"
   echo "status: $status"
   assert_success
diff --git a/tests/unit/builder-railpack.bats b/tests/unit/builder-railpack.bats
index 2f5ab5541..531aed86b 100644
--- a/tests/unit/builder-railpack.bats
+++ b/tests/unit/builder-railpack.bats
@@ -72,7 +72,7 @@ teardown() {
   assert_output_contains 'create mise config'
   assert_output_contains 'Successfully built image in'
 
-  run /bin/bash -c "dokku run $TEST_APP python task.py test"
+  run /bin/bash -c "dokku run $TEST_APP python3 task.py test"
   echo "output: $output"
   echo "status: $status"
   assert_success