diff --git a/Miniforge3/construct.yaml b/Miniforge3/construct.yaml
index 31c6e9ea..daf35252 100644
--- a/Miniforge3/construct.yaml
+++ b/Miniforge3/construct.yaml
@@ -1,9 +1,9 @@
-{% set version = os.environ.get("MINIFORGE_VERSION", "25.1.1-0") %}
-{% set conda_libmamba_solver_version = "25.1.1"%}
-# When `mamba_version` is updated here, also update the value of:
+{% set version = os.environ.get("MINIFORGE_VERSION", "24.11.3-0") %}
+{% set conda_libmamba_solver_version = "24.9.0"%}
+# This file is parsed by the scripts to define
 #   - `MICROMAMBA_VERSION` in `scripts/build.sh`
 #   - `MAMBA_VERSION` in `scripts/test.sh`
-{% set mamba_version = "2.0.6" %}
+{% set mamba_version = "1.5.12" %}
 
 name: Miniforge3
 version: {{ version }}
diff --git a/scripts/build.sh b/scripts/build.sh
index aac085a4..92d11ec7 100755
--- a/scripts/build.sh
+++ b/scripts/build.sh
@@ -38,7 +38,8 @@ cp LICENSE "${TEMP_DIR}/"
 ls -al "${TEMP_DIR}"
 
 if [[ "${TARGET_PLATFORM}" != win-* ]]; then
-    MICROMAMBA_VERSION=2.0.6
+    # Assumes specific structure in construct.yaml
+    MICROMAMBA_VERSION=$(grep "set mamba_version" Miniforge3/construct.yaml | cut -d '=' -f 2 | cut -d '"' -f 2)
     MICROMAMBA_BUILD=0
     mkdir "${TEMP_DIR}/micromamba"
     pushd "${TEMP_DIR}/micromamba"
diff --git a/scripts/test.sh b/scripts/test.sh
index 089f27de..e98cc270 100755
--- a/scripts/test.sh
+++ b/scripts/test.sh
@@ -5,7 +5,8 @@ set -ex
 echo "***** Start: Testing Miniforge installer *****"
 
 export CONDA_PATH="${HOME}/miniforge"
-export MAMBA_VERSION="${MAMBA_VERSION:-2.0.6}"
+MAMBA_VERSION=$(grep "set mamba_version" Miniforge3/construct.yaml | cut -d '=' -f 2 | cut -d '"' -f 2)
+export MAMBA_VERSION
 
 CONSTRUCT_ROOT="${CONSTRUCT_ROOT:-${PWD}}"
 
@@ -73,28 +74,6 @@ EOF
   conda list
 fi
 
-echo "+ Mamba does not warn (check that there is no warning on stderr) and returns exit code 0"
-mamba --help 2> stderr.log || cat stderr.log
-test ! -s stderr.log
-rm -f stderr.log
-
-echo "+ mamba info"
-mamba info
-
-echo "+ mamba config sources"
-mamba config sources
-
-echo "+ mamba config list"
-mamba config list
-
-echo "+ Testing mamba version (i.e. ${MAMBA_VERSION})"
-mamba info --json | python -c "import sys, json; info = json.loads(sys.stdin.read()); assert info['mamba version'] == '${MAMBA_VERSION}', info"
-echo "  OK"
-
-echo "+ Testing mamba channels"
-mamba info --json | python -c "import sys, json; info = json.loads(sys.stdin.read()); assert any('conda-forge' in c for c in info['channels']), info"
-echo "  OK"
-
 echo "***** Python path *****"
 python -c "import sys; print(sys.executable)"
 python -c "import sys; assert 'miniforge' in sys.executable"
@@ -107,43 +86,3 @@ python -c "import platform; print(platform.machine())"
 python -c "import platform; print(platform.release())"
 
 echo "***** Done: Testing installer *****"
-
-echo "***** Testing the usage of mamba main commands *****"
-
-echo "***** Initialize the current session for mamba *****"
-eval "$(mamba shell hook --shell bash)"
-
-echo "***** Create a new environment *****"
-ENV_PREFIX="/tmp/testenv"
-
-mamba create -p $ENV_PREFIX numpy --yes -vvv
-
-echo "***** Activate the environment with mamba *****"
-mamba activate $ENV_PREFIX
-
-echo "***** Check that numpy is installed with mamba list *****"
-mamba list | grep numpy
-
-echo "***** Deactivate the environment *****"
-mamba deactivate
-
-echo "***** Activate the environment with conda *****"
-conda activate $ENV_PREFIX
-
-echo "***** Check that numpy is installed with python *****"
-python -c "import numpy; print(numpy.__version__)"
-
-echo "***** Remove numpy *****"
-mamba remove numpy --yes
-
-echo "***** Check that numpy is not installed with mamba list *****"
-mamba list | grep -v numpy
-
-echo "***** Deactivate the environment with conda *****"
-conda deactivate
-
-echo "***** Remove the environment *****"
-mamba env remove -p $ENV_PREFIX --yes
-
-echo "***** Done: Testing mamba main commands *****"
-