diff --git a/.github/workflows/build-and-test.yml b/.github/workflows/build-and-test.yml
index 30ceedb..6709681 100644
--- a/.github/workflows/build-and-test.yml
+++ b/.github/workflows/build-and-test.yml
@@ -12,7 +12,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest]
-        python-version: [3.8, 3.9]
+        python-version: [3.7, 3.8, 3.9]
     steps:
     - uses: actions/checkout@v2
     - name: Set up Python
diff --git a/torchensemble/tests/test_all_models.py b/torchensemble/tests/test_all_models.py
index 9a5c9bd..00d1b78 100644
--- a/torchensemble/tests/test_all_models.py
+++ b/torchensemble/tests/test_all_models.py
@@ -16,7 +16,7 @@
     torchensemble.VotingClassifier,
     torchensemble.BaggingClassifier,
     torchensemble.GradientBoostingClassifier,
-    # torchensemble.SnapshotEnsembleClassifier,
+    torchensemble.SnapshotEnsembleClassifier,
     torchensemble.AdversarialTrainingClassifier,
     torchensemble.FastGeometricClassifier,
     torchensemble.SoftGradientBoostingClassifier,
@@ -38,7 +38,7 @@
 
 np.random.seed(0)
 torch.manual_seed(0)
-set_logger("pytest_all_models")
+logger = set_logger("pytest_all_models")
 
 
 # Base estimator
@@ -117,8 +117,9 @@ def test_clf_class(clf):
     # Train
     model.fit(train_loader, epochs=epochs, test_loader=test_loader)
 
-    # Evaluate
+    # Evaluate & Save
     model.evaluate(test_loader)
+    io.save(model, "./", logger)
 
     # Predict
     for _, (data, target) in enumerate(test_loader):
@@ -166,8 +167,9 @@ def test_clf_object(clf):
     # Train
     model.fit(train_loader, epochs=epochs, test_loader=test_loader)
 
-    # Evaluate
+    # Evaluate & Save
     model.evaluate(test_loader)
+    io.save(model, "./", logger)
 
     # Predict
     for _, (data, target) in enumerate(test_loader):
@@ -215,8 +217,9 @@ def test_reg_class(reg):
     # Train
     model.fit(train_loader, epochs=epochs, test_loader=test_loader)
 
-    # Evaluate
+    # Evaluate & Save
     model.evaluate(test_loader)
+    io.save(model, "./", logger)
 
     # Predict
     for _, (data, target) in enumerate(test_loader):
@@ -264,8 +267,9 @@ def test_reg_object(reg):
     # Train
     model.fit(train_loader, epochs=epochs, test_loader=test_loader)
 
-    # Evaluate
+    # Evaluate & Save
     model.evaluate(test_loader)
+    io.save(model, "./", logger)
 
     # Predict
     for _, (data, target) in enumerate(test_loader):