diff --git a/tests/README.md b/tests/README.md
index 2063fde..02ddece 100644
--- a/tests/README.md
+++ b/tests/README.md
@@ -7,15 +7,13 @@ The `run-tests.sh` script will...
 
 ## Environment
 The following GNU Bash environments were used:
-- MINGW64 (e.g., https://gitforwindows.org)
-- WSL2 (IAR Build Tools for Linux)
+- MINGW64 (https://msys2.org)
+- WSL2/Ubuntu 20.04 (IAR Build Tools for Linux)
+- CYGWIN64 (https://cygwin.com)
 
-## Instructions
-- Export the `$IAR_TOOL_ROOT` environment variable.
-```bash
-export IAR_TOOL_ROOT=/path/to/IAR/tools/top/level
-```
-> __Note__ Make `$IAR_TOOL_ROOT` point to the top-level location in which all the IAR toolchains are installed.
+## Environment variables
+### IAR_TOOL_ROOT
+Export the `$IAR_TOOL_ROOT` environment variable, pointing to the top-level location in which all the IAR toolchains are installed. (Default: not set)
 
 | Examples                       | Effect                                                                |
 | :----------------------------  | :-------------------------------------------------------------------- |
@@ -24,6 +22,46 @@ export IAR_TOOL_ROOT=/path/to/IAR/tools/top/level
 | `/c/IAR_Systems/EW/ARM/[7-9]*` | Perform tests on "Embedded Workbench for Arm" from V7 to V9.          |
 | `/c/IAR_Systems/EW/ARM/9.30.1` | Perform tests only using "Embedded Workbench 9.30.1".                 |
 
-> __Note__ Optionally export `IAR_LMS2_SERVER_IP` if client's 1st-time license setup is required. (Applies to `-GL` and `-NW`).
+### IAR_LMS2_SERVER_IP (optional)
+Export the `IAR_LMS2_SERVER_IP` environment pointing to the license server, if the client's 1st-time license setup is required. Applies to the `-GL` and `-NW` products. (Default: not set)
+
+### CMAKE_MAKE_PROGRAM (optional)
+Export the `CMAKE_MAKE_PROGRAM` to specify which generator to use. (Default: `Ninja`)
+
+### MSYSTEM
+This variable is automatically set by MSYS2, MINGW64 and MINGW32. CygWin users must set this environment variable manually.
 
-- Execute `run-tests.sh`.
+Example: `export MSYSTEM=CYGWIN`
+
+## Procedure example using __MINGW64__
+The example below will test every tool found in `C:\IAR_Systems\EW` using MINGW64:
+```bash
+export IAR_TOOL_ROOT=/c/IAR_Systems/EW
+# Extracted from a zip archive
+export PATH=/c/cmake-3.25.0-x86_64/bin:$PATH
+git clone https://github.com/iarsystems/cmake-tutorial ~
+cd ~/cmake-tutorial/tests
+./run-tests.sh
+```
+
+## Procedure example using __Ubuntu on WSL2__
+The example below will test every tool found in `/opt/iarsystems` using Ubuntu (WSL2):
+```bash
+export IAR_TOOL_ROOT=/opt/iarsystems
+git clone https://github.com/iarsystems/cmake-tutorial ~
+cd ~/cmake-tutorial/tests
+./run-tests.sh
+```
+
+## Procedure example using __CygWin64__
+The example below will test every tool found in `C:\IAR_Systems\EW` using Cygwin:
+```bash
+export IAR_TOOL_ROOT=/cygdrive/c/IAR_Systems/EW
+# Only required by Cygwin
+export MSYSTEM=CYGWIN
+# Extracted from a zip archive
+export PATH=/cygdrive/c/cmake-3.25.0-x86_64/bin:$PATH
+git clone https://github.com/iarsystems/cmake-tutorial ~
+cd ~/cmake-tutorial/tests
+./run-tests.sh
+```
diff --git a/tests/run-tests.sh b/tests/run-tests.sh
index f2cbd3c..1b55714 100755
--- a/tests/run-tests.sh
+++ b/tests/run-tests.sh
@@ -8,12 +8,21 @@
 #
 
 # Environment variables that can be set for this script
+#
 # IAR_TOOL_ROOT
 #   Top-level location in which the IAR toolchains are installed
 #   MINGW64: with the full path (e.g.,) `/c/IAR_Systems/`
 #   Default: /opt/iarsystems
+#
 # IAR_LMS2_SERVER_IP
 #   If defined, automatic license setup will be performed
+#
+# MSYSTEM
+#   Only required for Windows hosts (e.g., MINGW64 or CYGWIN)
+#   Set by default by MINGW64 (and MINGW32)
+#   CygWin users: must manually export the variable to CYGWIN
+#   (e.g., export MSYSTEM=CYGWIN)
+#
 
 BUILD_CFGS=(Debug RelWithDebInfo Release MinSizeRel)
 
@@ -21,7 +30,7 @@ if ! ((${#IAR_TOOL_ROOT[@]})); then
   IAR_TOOL_ROOT=/opt/iarsystems
 fi
 
-if [ "$MSYSTEM" = "MINGW64" ]; then
+if [ ! -z "$MSYSTEM" ]; then
   EXT=.exe;
 fi
 
@@ -40,14 +49,13 @@ function lms2-setup() {
   fi
 }
 
-
 function find_icc() {
-  if [ "$MSYSTEM" = "MINGW64" ]; then
-    export CC=$(cygpath -m "${p}");
-    export CXX=$CC;
-  else
+  if [ -z "$MSYSTEM" ]; then
     export CC="${p}";
     export CXX="${p}";
+  else
+    export CC=$(cygpath -m "${p}");
+    export CXX=$CC;
   fi
   export TOOLKIT_DIR=$(dirname $(dirname $CC))
   echo "Using  CC: $CC";
@@ -55,16 +63,16 @@ function find_icc() {
 }
 
 function find_ilink() {
-  if [ "$MSYSTEM" = "MINGW64" ]; then
-    export ASM=$(cygpath -m $(dirname ${p})/iasm${a}${EXT});
-  else
+  if [ -z "$MSYSTEM" ]; then
     export ASM=$(dirname ${p})/iasm${a};
+  else
+    export ASM=$(cygpath -m $(dirname ${p})/iasm${a}${EXT});
   fi
   echo "Using ASM: $ASM";
 }
 
 function find_xlink() {
-  if [ "$MSYSTEM" = "MINGW64" ]; then
+  if [ ! -z "$MSYSTEM" ]; then
     export ASM=$(cygpath -m $(dirname ${p})/a${a}${EXT});
   else
     export ASM=$(dirname ${p})/a${a};
@@ -74,17 +82,19 @@ function find_xlink() {
 
 function cmake_configure() {
   rm -rf _builds;
-  if [ "$MSYSTEM" = "MINGW64" ]; then
-    CMAKE_MAKE_PRG=$(cygpath -m $(which ninja));
-  else
-    CMAKE_MAKE_PRG=$(which ninja);
+  # If no CMAKE_MAKE_PROGRAM is set, defaults to ninja
+  if [ -z "$CMAKE_MAKE_PROGRAM" ]; then
+    if [ -z "$MSYSTEM" ]; then
+      export CMAKE_MAKE_PROGRAM=$(which ninja);
+    else
+      export CMAKE_MAKE_PROGRAM=$(cygpath -m $(which ninja));
+    fi
   fi
-  if [ ! $CMAKE_MAKE_PRG ]; then
-    echo "FATAL ERROR: Ninja not found.";
+  if [ ! -f $CMAKE_MAKE_PROGRAM ]; then
+    echo "FATAL ERROR: CMAKE_MAKE_PROGRAM not found ($CMAKE_MAKE_PROGRAM). No ninja executable found either.";
     exit 1;
   fi
   cmake -B _builds -G "Ninja Multi-Config" \
-    -DCMAKE_MAKE_PROGRAM=$CMAKE_MAKE_PRG \
     -DTARGET_ARCH=${a} \
     -DTOOLKIT_DIR=${TOOLKIT_DIR};
   if [ $? -ne 0 ]; then