diff --git a/tests/scripts/all.sh b/tests/scripts/all.sh
index 85f6848..5fe8db6 100755
--- a/tests/scripts/all.sh
+++ b/tests/scripts/all.sh
@@ -1960,7 +1960,7 @@
     scripts/config.py set MBEDTLS_PLATFORM_MEMORY
     scripts/config.py set MBEDTLS_MEMORY_BACKTRACE
     scripts/config.py set MBEDTLS_MEMORY_DEBUG
-    CC=gcc cmake .
+    CC=gcc cmake -DCMAKE_BUILD_TYPE:String=Release .
     make
 
     msg "test: MBEDTLS_MEMORY_BUFFER_ALLOC_C and MBEDTLS_MEMORY_BACKTRACE"
@@ -1971,7 +1971,7 @@
     msg "build: default config with memory buffer allocator"
     scripts/config.py set MBEDTLS_MEMORY_BUFFER_ALLOC_C
     scripts/config.py set MBEDTLS_PLATFORM_MEMORY
-    CC=gcc cmake .
+    CC=gcc cmake -DCMAKE_BUILD_TYPE:String=Release .
     make
 
     msg "test: MBEDTLS_MEMORY_BUFFER_ALLOC_C"
@@ -2068,7 +2068,7 @@
     scripts/config.py set MBEDTLS_MEMORY_DEBUG
     scripts/config.py set MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
     scripts/config.py set MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH
-    CC=gcc cmake .
+    CC=gcc cmake -DCMAKE_BUILD_TYPE:String=Release .
     make
 
     msg "test: MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH, MBEDTLS_MEMORY_BUFFER_ALLOC_C, MBEDTLS_MEMORY_DEBUG and MBEDTLS_SSL_MAX_FRAGMENT_LENGTH"