diff --git a/repo2podman/podman.py b/repo2podman/podman.py
index 7cc6129..d45dccb 100644
--- a/repo2podman/podman.py
+++ b/repo2podman/podman.py
@@ -256,11 +256,12 @@ class PodmanContainer(Container):
     def __init__(self, cid, podman_executable="podman"):
         self.id = cid
         self._podman_executable = podman_executable
+        self.format_arg = "{{json .}}"
         self.reload()
 
     def reload(self):
         lines = exec_podman(
-            ["inspect", "--type", "container", "--format", "json", self.id],
+            ["inspect", "--type", "container", "--format", self.format_arg, self.id],
             capture="stdout",
             exe=self._podman_executable,
         )
@@ -374,6 +375,7 @@ class PodmanEngine(ContainerEngine):
     def __init__(self, *, parent):
         super().__init__(parent=parent)
 
+        self.format_arg = "{{json .}}"
         lines = exec_podman(["info"], capture="stdout", exe=self.podman_executable)
         log_debug(lines)
 
@@ -483,7 +485,7 @@ def remove_local(tags):
                         yield tag[10:]
 
         lines = exec_podman(
-            ["image", "list", "--format", "json"],
+            ["image", "list", "--format", self.format_arg],
             capture="stdout",
             exe=self.podman_executable,
         )
@@ -503,7 +505,7 @@ def remove_local(tags):
 
     def inspect_image(self, image):
         lines = exec_podman(
-            ["inspect", "--type", "image", "--format", "json", image],
+            ["inspect", "--type", "image", "--format", self.format_arg, image],
             capture="stdout",
             exe=self.podman_executable,
         )
diff --git a/tests/unit/test_podman.py b/tests/unit/test_podman.py
index 0593592..9b9e14a 100644
--- a/tests/unit/test_podman.py
+++ b/tests/unit/test_podman.py
@@ -66,7 +66,8 @@ def test_run():
     c.remove()
     with pytest.raises(PodmanCommandError) as exc:
         c.reload()
-    assert "".join(exc.value.output).strip() == "[]"
+    # Podman 3 returns "[]" instead of ""
+    assert "".join(exc.value.output).strip() in ("[]", "")
 
 
 def test_run_autoremove():
@@ -77,7 +78,8 @@ def test_run_autoremove():
     sleep(3)
     with pytest.raises(PodmanCommandError) as exc:
         c.reload()
-    assert "".join(exc.value.output).strip() == "[]"
+    # Podman 3 returns "[]" instead of ""
+    assert "".join(exc.value.output).strip() in ("[]", "")
 
 
 def test_run_detach_wait():
@@ -93,7 +95,8 @@ def test_run_detach_wait():
     c.remove()
     with pytest.raises(PodmanCommandError) as exc:
         c.reload()
-    assert "".join(exc.value.output).strip() == "[]"
+    # Podman 3 returns "[]" instead of ""
+    assert "".join(exc.value.output).strip() in ("[]", "")
 
 
 def test_run_detach_nostream():
@@ -146,8 +149,8 @@ def test_custom_executable(tmp_path):
     exe = tmp_path.joinpath("custom_exe.sh")
     with exe.open("w") as f:
         f.write("#!/bin/sh\n")
-        f.write(f"echo $@ >> {log}\n")
-        f.write("exec podman $@\n")
+        f.write(f'echo "$@" >> {log}\n')
+        f.write('exec podman "$@"\n')
     exe.chmod(0o755)
 
     client = PodmanEngine(parent=None)
@@ -168,7 +171,7 @@ def test_custom_executable(tmp_path):
         lines = f.read().splitlines()
     assert lines == [
         f"run --detach --log-level=debug {BUSYBOX} id -un",
-        f"inspect --type container --format json {cid}",
+        f"inspect --type container --format {{{{json .}}}} {cid}",
         f"logs {cid}",
         f"rm {cid}",
     ]