diff --git a/lib/charms/hpc_libs/v0/slurm_ops.py b/lib/charms/hpc_libs/v0/slurm_ops.py
index d72c145..d583d9b 100644
--- a/lib/charms/hpc_libs/v0/slurm_ops.py
+++ b/lib/charms/hpc_libs/v0/slurm_ops.py
@@ -59,6 +59,7 @@ def _on_install(self, _) -> None:
     "format_key",
     "install",
     "version",
+    "ConfigurationManager",
     "ServiceType",
     "SlurmManagerBase",
 ]
@@ -81,7 +82,7 @@ def _on_install(self, _) -> None:
 
 # Increment this PATCH version before using `charmcraft publish-lib` or reset
 # to 0 if you are raising the major API version
-LIBPATCH = 2
+LIBPATCH = 3
 
 # Charm library dependencies to fetch during `charmcraft pack`.
 PYDEPS = ["pyyaml>=6.0.1"]
@@ -202,8 +203,8 @@ def restart(self) -> None:
 class ConfigurationManager:
     """Control configuration of a Slurm component."""
 
-    def __init__(self, service: ServiceType) -> None:
-        self._service = service
+    def __init__(self, name: str) -> None:
+        self._name = name
 
     def get_options(self, *keys: str) -> Mapping[str, Any]:
         """Get given configurations values for Slurm component."""
@@ -215,20 +216,20 @@ def get_options(self, *keys: str) -> Mapping[str, Any]:
 
         return configs
 
-    def get(self, key: str) -> Any:
+    def get(self, key: Optional[str] = None) -> Any:
         """Get specific configuration value for Slurm component."""
-        key = f"{self._service.config_name}.{key}"
+        key = f"{self._name}.{key}" if key else self._name
         config = json.loads(_snap("get", "-d", "slurm", key))
         return config[key]
 
     def set(self, config: Mapping[str, Any]) -> None:
         """Set configuration for Slurm component."""
-        args = [f"{self._service.config_name}.{k}={json.dumps(v)}" for k, v in config.items()]
+        args = [f"{self._name}.{k}={json.dumps(v)}" for k, v in config.items()]
         _snap("set", "slurm", *args)
 
-    def unset(self, *keys) -> None:
+    def unset(self, *keys: str) -> None:
         """Unset configuration for Slurm component."""
-        args = [f"{self._service.config_name}.{k}!" for k in keys]
+        args = [f"{self._name}.{k}" for k in keys] if len(keys) > 0 else [self._name]
         _snap("unset", "slurm", *args)
 
 
@@ -236,8 +237,9 @@ class MungeManager(ServiceManager):
     """Manage `munged` service operations."""
 
     def __init__(self) -> None:
-        self._service = ServiceType.MUNGED
-        self.config = ConfigurationManager(ServiceType.MUNGED)
+        service = ServiceType.MUNGED
+        self._service = service
+        self.config = ConfigurationManager(service.config_name)
 
     def get_key(self) -> str:
         """Get the current munge key.
@@ -265,5 +267,5 @@ class SlurmManagerBase(ServiceManager):
 
     def __init__(self, service: ServiceType) -> None:
         self._service = service
-        self.config = ConfigurationManager(service)
+        self.config = ConfigurationManager(service.config_name)
         self.munge = MungeManager()
diff --git a/tests/unit/test_slurm_ops.py b/tests/unit/test_slurm_ops.py
index 652f02c..3c6900a 100644
--- a/tests/unit/test_slurm_ops.py
+++ b/tests/unit/test_slurm_ops.py
@@ -79,19 +79,19 @@ def test_config_name(self, *_) -> None:
     def test_enable(self, subcmd, *_) -> None:
         """Test that the manager calls the correct enable command."""
         self.manager.enable()
-        calls = [args[0][0] for args in subcmd.call_args_list]
 
+        args = subcmd.call_args[0][0]
         self.assertEqual(
-            calls[0], ["snap", "start", "--enable", f"slurm.{self.manager._service.value}"]
+            args, ["snap", "start", "--enable", f"slurm.{self.manager._service.value}"]
         )
 
     def test_disable(self, subcmd, *_) -> None:
         """Test that the manager calls the correct disable command."""
         self.manager.disable()
-        calls = [args[0][0] for args in subcmd.call_args_list]
 
+        args = subcmd.call_args[0][0]
         self.assertEqual(
-            calls[0], ["snap", "stop", "--disable", f"slurm.{self.manager._service.value}"]
+            args, ["snap", "stop", "--disable", f"slurm.{self.manager._service.value}"]
         )
 
     def test_restart(self, subcmd, *_) -> None:
@@ -120,6 +120,14 @@ def test_get_config(self, subcmd, *_) -> None:
         self.assertEqual(args, ["snap", "get", "-d", "slurm", f"{self.config_name}.key"])
         self.assertEqual(value, "value")
 
+    def test_get_config_all(self, subcmd) -> None:
+        """Test that manager calls the correct `snap get ...` with no arguments given."""
+        subcmd.return_value = '{"%s": "value"}' % self.config_name
+        value = self.manager.config.get()
+        args = subcmd.call_args[0][0]
+        self.assertEqual(args, ["snap", "get", "-d", "slurm", self.config_name])
+        self.assertEqual(value, "value")
+
     def test_set_config(self, subcmd, *_) -> None:
         """Test that the manager calls the correct `snap set ...` command."""
         self.manager.config.set({"key": "value"})
@@ -130,7 +138,13 @@ def test_unset_config(self, subcmd) -> None:
         """Test that the manager calls the correct `snap unset ...` command."""
         self.manager.config.unset("key")
         args = subcmd.call_args[0][0]
-        self.assertEqual(args, ["snap", "unset", "slurm", f"{self.config_name}.key!"])
+        self.assertEqual(args, ["snap", "unset", "slurm", f"{self.config_name}.key"])
+
+    def test_unset_config_all(self, subcmd) -> None:
+        """Test the manager calls the correct `snap unset ...` with no arguments given."""
+        self.manager.config.unset()
+        args = subcmd.call_args[0][0]
+        self.assertEqual(args, ["snap", "unset", "slurm", self.config_name])
 
     def test_generate_munge_key(self, subcmd, *_) -> None:
         """Test that the manager calls the correct `mungectl` command."""