diff --git a/examples/loop_optimizations_service/env_tests.py b/examples/loop_optimizations_service/env_tests.py
index b217713f19..2329caa4ac 100644
--- a/examples/loop_optimizations_service/env_tests.py
+++ b/examples/loop_optimizations_service/env_tests.py
@@ -88,6 +88,7 @@ def test_observation_spaces(env: CompilerEnv):
         "ir",
         "Inst2vec",
         "Autophase",
+        "AutophaseDict",
         "Programl",
         "runtime",
         "size",
@@ -102,8 +103,13 @@ def test_observation_spaces(env: CompilerEnv):
         size_range=(0, np.iinfo(int).max),
         dtype=int,
     )
-    assert env.observation.spaces["Autophase"].space == Dict(
+    assert env.observation.spaces["Autophase"].space == Sequence(
         name="Autophase",
+        size_range=(len(AUTOPHASE_FEATURE_NAMES), len(AUTOPHASE_FEATURE_NAMES)),
+        dtype=int,
+    )
+    assert env.observation.spaces["AutophaseDict"].space == Dict(
+        name="AutophaseDict",
         spaces={
             name: Scalar(name="", min=0, max=np.iinfo(np.int64).max, dtype=np.int64)
             for name in AUTOPHASE_FEATURE_NAMES
@@ -182,7 +188,7 @@ def test_Step_out_of_range(env: CompilerEnv):
 
 
 def test_default_ir_observation(env: CompilerEnv):
-    """Test default observation space."""
+    """Test default IR observation space."""
     env.observation_space = "ir"
     observation = env.reset()
     assert len(observation) > 0
@@ -194,7 +200,7 @@ def test_default_ir_observation(env: CompilerEnv):
 
 
 def test_default_inst2vec_observation(env: CompilerEnv):
-    """Test default observation space."""
+    """Test default inst2vec observation space."""
     env.observation_space = "Inst2vec"
     observation = env.reset()
     assert isinstance(observation, np.ndarray)
@@ -204,7 +210,7 @@ def test_default_inst2vec_observation(env: CompilerEnv):
 
 
 def test_default_autophase_observation(env: CompilerEnv):
-    """Test default observation space."""
+    """Test default autophase observation space."""
     env.observation_space = "Autophase"
     observation = env.reset()
     assert isinstance(observation, np.ndarray)
@@ -213,6 +219,16 @@ def test_default_autophase_observation(env: CompilerEnv):
     assert all(obs >= 0 for obs in observation.tolist())
 
 
+def test_default_autophase_dict_observation(env: CompilerEnv):
+    """Test default autophase dict observation space."""
+    env.observation_space = "AutophaseDict"
+    observation = env.reset()
+    assert isinstance(observation, dict)
+    assert observation.keys() == AUTOPHASE_FEATURE_NAMES
+    assert len(observation.values()) == len(AUTOPHASE_FEATURE_NAMES)
+    assert all(obs >= 0 for obs in observation.values())
+
+
 def test_default_programl_observation(env: CompilerEnv):
     """Test default observation space."""
     env.observation_space = "Programl"