diff --git a/.github/workflows/runtests.yml b/.github/workflows/runtests.yml
index 132075145e55..2693ab7679f7 100644
--- a/.github/workflows/runtests.yml
+++ b/.github/workflows/runtests.yml
@@ -130,7 +130,7 @@ jobs:
           python-version: '3.9'
       - run: sudo apt install antlr4 libgfortran5 gfortran libmpfr-dev libmpc-dev
       - run: python -m pip install --upgrade pip
-      - run: pip install mpmath gmpy2 matplotlib numpy scipy pymc3 aesara ipython \
+      - run: pip install mpmath gmpy2 matplotlib numpy scipy aesara ipython \
                          symengine cython llvmlite wurlitzer \
                          autowrap numexpr 'antlr4-python3-runtime==4.7.*'
       # Test external imports