diff --git a/tools/ci/build_template_app.sh b/tools/ci/build_template_app.sh
index abda314691..80e0b2ebf9 100755
--- a/tools/ci/build_template_app.sh
+++ b/tools/ci/build_template_app.sh
@@ -17,9 +17,13 @@ gen_configs() {
     # CONFIG_COMPILER_OPTIMIZATION_NONE with flag -O0
     echo "CONFIG_COMPILER_OPTIMIZATION_NONE=y" > esp-idf-template/sdkconfig.ci.O0
     echo "CONFIG_BOOTLOADER_COMPILER_OPTIMIZATION_NONE=y" >> esp-idf-template/sdkconfig.ci.O0
+    # -O0 makes the bootloader too large to fit in the default space, otherwise(!)
+    echo "CONFIG_PARTITION_TABLE_OFFSET=0x10000" >> esp-idf-template/sdkconfig.ci.O0
+
     # CONFIG_COMPILER_OPTIMIZATION_SIZE with flag -Os
     echo "CONFIG_COMPILER_OPTIMIZATION_SIZE=y" > esp-idf-template/sdkconfig.ci.Os
     echo "CONFIG_BOOTLOADER_COMPILER_OPTIMIZATION_SIZE=y" >> esp-idf-template/sdkconfig.ci.Os
+
     # CONFIG_COMPILER_OPTIMIZATION_PERF with flag -O2
     echo "CONFIG_COMPILER_OPTIMIZATION_PERF=y" > esp-idf-template/sdkconfig.ci.O2
     echo "CONFIG_BOOTLOADER_COMPILER_OPTIMIZATION_PERF=y" >> esp-idf-template/sdkconfig.ci.O2