diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b62efbb25..e6712f8e5 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -34,15 +34,13 @@ jobs:
     - name: Checkout
       uses: actions/checkout@v3
 
-    - name: Install dependencies with Miniconda
-      uses: conda-incubator/setup-miniconda@v2
+    - name: Set up conda environment
+      uses: mamba-org/setup-micromamba@v1
       with:
-        python-version: ${{ matrix.python-version }}
-        mamba-version: "*"
-        activate-environment: forcebalance-test
         environment-file: devtools/conda-envs/test_env.yaml
-        auto-activate-base: false
-
+        create-args: >- # beware the >- instead of |, we don't split on newlines but on spaces
+          python=${{ matrix.python-version }}
+          
     - name: Additional info about the build
       shell: bash
       run: |
@@ -91,10 +89,10 @@ jobs:
         cd gromacs-5.1.5
         cp -r cmake cmake_s
         cd cmake
-        cmake -DCMAKE_INSTALL_PREFIX=$GITHUB_WORKSPACE/opt/gromacs/5.1.5 -DGMX_DOUBLE=ON -DGMX_BUILD_OWN_FFTW=ON ..
+        cmake -DCMAKE_INSTALL_PREFIX=$GITHUB_WORKSPACE/opt/gromacs/5.1.5 -DGMX_DOUBLE=ON -DGMX_BUILD_OWN_FFTW=ON -DGMX_USE_RDTSCP=OFF ..
         make -j 8 && make install
         cd ../cmake_s
-        cmake -DCMAKE_INSTALL_PREFIX=$GITHUB_WORKSPACE/opt/gromacs/5.1.5 -DGMX_BUILD_OWN_FFTW=ON ..
+        cmake -DCMAKE_INSTALL_PREFIX=$GITHUB_WORKSPACE/opt/gromacs/5.1.5 -DGMX_BUILD_OWN_FFTW=ON -DGMX_USE_RDTSCP=OFF ..
         make -j 8 && make install
         cd ..
         . $GITHUB_WORKSPACE/opt/gromacs/5.1.5/bin/GMXRC.bash
@@ -115,7 +113,7 @@ jobs:
 
     - name: Run tests
       run: |
-        pytest -v --cov=forcebalance --cov-config=setup.cfg --durations=0 --cov-report=xml
+        pytest -vx --cov=forcebalance --cov-config=setup.cfg --durations=0 --cov-report=xml -k "not TestEvaluatorBromineStudy" src/tests/
 
     - name: Run water study
       run: |
@@ -128,4 +126,4 @@ jobs:
       uses: codecov/codecov-action@v3
       with:
         file: ./coverage.xml
-        fail_ci_if_error: true
+        fail_ci_if_error: false
diff --git a/devtools/conda-envs/test_env.yaml b/devtools/conda-envs/test_env.yaml
index f1730b205..c9ae7f06a 100644
--- a/devtools/conda-envs/test_env.yaml
+++ b/devtools/conda-envs/test_env.yaml
@@ -28,4 +28,4 @@ dependencies:
   - openff-evaluator-base >= 0.4.1
   - pint =0.20
   # - openff-recharge
-  - openeye-toolkits
+  # - openeye-toolkits (Don't have a license file to use with GH Actions.)