diff --git a/test_requirements.in b/test_requirements.in
index e75a81471..453e2701c 100644
--- a/test_requirements.in
+++ b/test_requirements.in
@@ -1,7 +1,6 @@
 docker~=4.0
 pytest~=5.2
 pytest-xdist~=1.26  # Parallelises the test-runs
-ruamel.yaml~=0.15
 pytest-mock~=1.11
 pytest-mypy~=0.3
 pytest-timeout~=1.3
diff --git a/test_requirements.txt b/test_requirements.txt
index 2b5111858..baf2c4a91 100644
--- a/test_requirements.txt
+++ b/test_requirements.txt
@@ -80,8 +80,6 @@ qtconsole==4.5.5          # via jupyter
 regex==2019.8.19          # via black
 requests==2.22.0          # via adal, docker, responses
 responses==0.10.6
-ruamel.yaml.clib==0.2.0   # via ruamel.yaml
-ruamel.yaml==0.16.5
 scikit-learn==0.21.3
 scipy==1.3.1              # via scikit-learn
 send2trash==1.5.0         # via notebook
diff --git a/tests/conftest.py b/tests/conftest.py
index 0402f74e9..400185d1f 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -10,7 +10,7 @@
 import docker
 import pytest
 import requests
-import ruamel.yaml
+import yaml
 import numpy as np
 
 from gordo_components import serializer
@@ -92,7 +92,7 @@ def trained_model_directory(
         model_dir = os.path.join(collection_dir, gordo_name)
         os.makedirs(model_dir, exist_ok=True)
 
-        definition = ruamel.yaml.load(
+        definition = yaml.safe_load(
             """
             gordo_components.model.anomaly.diff.DiffBasedAnomalyDetector:
                 base_estimator:
@@ -102,8 +102,7 @@ def trained_model_directory(
                             - gordo_components.model.models.KerasAutoEncoder:
                                 kind: feedforward_hourglass
                         memory:
-            """,
-            Loader=ruamel.yaml.Loader,
+            """
         )
         model = serializer.pipeline_from_definition(definition)
         X = np.random.random(size=len(sensors) * 10).reshape(10, len(sensors))
diff --git a/tests/gordo_components/serializer/test_serializer_into_definition.py b/tests/gordo_components/serializer/test_serializer_into_definition.py
index eb04642e9..b7031f59b 100644
--- a/tests/gordo_components/serializer/test_serializer_into_definition.py
+++ b/tests/gordo_components/serializer/test_serializer_into_definition.py
@@ -2,8 +2,8 @@
 
 import unittest
 import logging
-import ruamel.yaml
-import io
+import yaml
+import json
 import pydoc
 
 from sklearn.pipeline import Pipeline, FeatureUnion
@@ -123,32 +123,31 @@ def setUp(self):
 
     def test_pipeline_into_definition(self):
 
-        expected_definition = (
-            """
+        expected_definition = """
             sklearn.pipeline.Pipeline:
-              memory:
+                memory: null
                 steps:
                     - sklearn.decomposition.pca.PCA:
                         copy: true
                         iterated_power: auto
                         n_components: 2
-                        random_state:
+                        random_state: null
                         svd_solver: auto
                         tol: 0.0
                         whiten: false
                     - sklearn.pipeline.FeatureUnion:
-                        n_jobs:
+                        n_jobs: null
                         transformer_list:
                         - sklearn.decomposition.pca.PCA:
                             copy: true
                             iterated_power: auto
                             n_components: 3
-                            random_state:
+                            random_state: null
                             svd_solver: auto
                             tol: 0.0
                             whiten: false
                         - sklearn.pipeline.Pipeline:
-                            memory:
+                            memory: null
                             steps:
                             - sklearn.preprocessing.data.MinMaxScaler:
                                 copy: true
@@ -159,33 +158,28 @@ def test_pipeline_into_definition(self):
                                 algorithm: randomized
                                 n_components: 2
                                 n_iter: 5
-                                random_state:
+                                random_state: null
                                 tol: 0.0
                             verbose: false
-                        transformer_weights:
+                        transformer_weights: null
                         verbose: false
                     - gordo_components.model.models.KerasAutoEncoder:
                         kind: feedforward_hourglass
                 verbose: false
-            """.rstrip()
-            .strip()
-            .replace(" ", "")
-        )
+            """
 
-        for pipe in self.variations_of_same_pipeline:
+        expected_definition = yaml.safe_load(expected_definition)
 
-            definition = pipeline_into_definition(pipe)
+        for pipe in self.variations_of_same_pipeline:
 
-            # Using ruamel over PyYaml, better output option support
-            stream = io.StringIO()
-            ruamel.yaml.dump(definition, stream, Dumper=ruamel.yaml.RoundTripDumper)
-            stream.seek(0)
+            definition = pipeline_into_definition(
+                pipeline_from_definition(pipeline_into_definition(pipe))
+            )
 
-            current_output = stream.read().rstrip().strip().replace(" ", "")
             self.assertEqual(
-                current_output,
-                expected_definition,
-                msg=f"Failed output:\n{current_output}\nExpected:----------------\n{expected_definition}",
+                json.dumps(definition),
+                json.dumps(expected_definition),
+                msg=f"Failed output:\n{definition}\nExpected:----------------\n{expected_definition}",
             )
 
     def test_into_from(self):
@@ -296,7 +290,7 @@ def test_from_into(self):
                         memory:
                         verbose: false
                     """
-                definition = ruamel.yaml.load(definition, Loader=ruamel.yaml.Loader)
+                definition = yaml.safe_load(definition)
                 pipe = pipeline_from_definition(definition)
                 pipeline_into_definition(pipe)