diff --git a/.github/workflows/run_all_tests.yml b/.github/workflows/run_all_tests.yml
index 8df190d55..b713f4763 100644
--- a/.github/workflows/run_all_tests.yml
+++ b/.github/workflows/run_all_tests.yml
@@ -165,13 +165,12 @@ jobs:
           auto-update-conda: true
           python-version: ${{ matrix.python-ver }}
           channels: conda-forge
-          mamba-version: "*"
 
       - name: Install build dependencies
         run: |
           conda config --set always_yes yes --set changeps1 no
           conda info
-          mamba install -c conda-forge "tox>=4"
+          conda install -c conda-forge "tox>=4"
 
       - name: Conda reporting
         run: |
@@ -229,7 +228,6 @@ jobs:
           python-version: ${{ matrix.python-ver }}
           channels: conda-forge
           auto-activate-base: false
-          mamba-version: "*"
 
       - name: Install run dependencies
         run: |
diff --git a/.github/workflows/run_coverage.yml b/.github/workflows/run_coverage.yml
index bd2eeb921..08b6c59ea 100644
--- a/.github/workflows/run_coverage.yml
+++ b/.github/workflows/run_coverage.yml
@@ -101,7 +101,6 @@ jobs:
           python-version: ${{ matrix.python-ver }}
           channels: conda-forge
           auto-activate-base: false
-          mamba-version: "*"
 
       - name: Install run dependencies
         run: |
diff --git a/.github/workflows/run_tests.yml b/.github/workflows/run_tests.yml
index 5e0b3bff2..2e94bcb62 100644
--- a/.github/workflows/run_tests.yml
+++ b/.github/workflows/run_tests.yml
@@ -139,13 +139,12 @@ jobs:
           auto-update-conda: true
           python-version: ${{ matrix.python-ver }}
           channels: conda-forge
-          mamba-version: "*"
 
       - name: Install build dependencies
         run: |
           conda config --set always_yes yes --set changeps1 no
           conda info
-          mamba install -c conda-forge "tox>=4"
+          conda install -c conda-forge "tox>=4"
 
       - name: Conda reporting
         run: |
@@ -239,7 +238,6 @@ jobs:
           python-version: ${{ matrix.python-ver }}
           channels: conda-forge
           auto-activate-base: false
-          mamba-version: "*"
 
       - name: Install run dependencies
         run: |
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 221182985..c84bfaffc 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -18,7 +18,7 @@ repos:
 #     hooks:
 #     -   id: black
 -   repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: v0.6.3
+    rev: v0.6.8
     hooks:
     -   id: ruff
 # -   repo: https://github.com/econchick/interrogate
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 211d94340..888a3cb70 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,7 +9,7 @@
 - Fixed bug in writing of string arrays to an HDF5 file that were read from an HDF5 file that was introduced in 3.14.4. @rly @stephprince
   [#1189](https://github.com/hdmf-dev/hdmf/pull/1189)
 - Fixed export of scalar datasets with a compound data type. @stephprince [#1185](https://github.com/hdmf-dev/hdmf/pull/1185)
-
+- Fixed mamba-related error in conda-based GitHub Actions. @rly [#1194](https://github.com/hdmf-dev/hdmf/pull/1194)
 
 ## HDMF 3.14.4 (September 4, 2024)