diff --git a/interfaces/cython/cantera/_cantera.pxd b/interfaces/cython/cantera/_cantera.pxd
index 049f3c1fc..cdcc08bf0 100644
--- a/interfaces/cython/cantera/_cantera.pxd
+++ b/interfaces/cython/cantera/_cantera.pxd
@@ -71,6 +71,7 @@ cdef extern from "cantera/base/global.h" namespace "Cantera":
     cdef XML_Node* CxxGetXmlFile "Cantera::get_XML_File" (string) except +translate_exception
     cdef XML_Node* CxxGetXmlFromString "Cantera::get_XML_from_string" (string) except +translate_exception
     cdef void Cxx_make_deprecation_warnings_fatal "Cantera::make_deprecation_warnings_fatal" ()
+    cdef void Cxx_suppress_deprecation_warnings "Cantera::suppress_deprecation_warnings" ()
     cdef void Cxx_suppress_thermo_warnings "Cantera::suppress_thermo_warnings" (cbool)
     cdef string CxxGitCommit "Cantera::gitCommit" ()
 
diff --git a/interfaces/cython/cantera/utils.pyx b/interfaces/cython/cantera/utils.pyx
index 4d927615d..0e2f80a7b 100644
--- a/interfaces/cython/cantera/utils.pyx
+++ b/interfaces/cython/cantera/utils.pyx
@@ -40,6 +40,9 @@ def appdelete():
 def make_deprecation_warnings_fatal():
     Cxx_make_deprecation_warnings_fatal()
 
+def suppress_deprecation_warnings():
+    Cxx_suppress_deprecation_warnings()
+
 def suppress_thermo_warnings(pybool suppress=True):
     Cxx_suppress_thermo_warnings(suppress)
 
diff --git a/src/base/application.h b/src/base/application.h
index e268da1e2..0f7946a72 100644
--- a/src/base/application.h
+++ b/src/base/application.h
@@ -338,6 +338,7 @@ public:
     //! prevent certain tests from failing.
     void suppress_deprecation_warnings() {
         m_suppress_deprecation_warnings = true;
+        m_fatal_deprecation_warnings = false;
     }
 
     //! Turns deprecation warnings into exceptions. Activated within the test
diff --git a/test/thermo/thermoFromYaml.cpp b/test/thermo/thermoFromYaml.cpp
index 2d47898c6..f377256ea 100644
--- a/test/thermo/thermoFromYaml.cpp
+++ b/test/thermo/thermoFromYaml.cpp
@@ -335,8 +335,10 @@ TEST(ThermoFromYaml, PureFluid_nitrogen)
 
 TEST(ThermoFromYaml, ConstDensityThermo)
 {
+    suppress_deprecation_warnings();
     auto thermo = newThermo("thermo-models.yaml", "const-density");
     EXPECT_DOUBLE_EQ(thermo->density(), 700.0);
+    make_deprecation_warnings_fatal();
 }
 
 TEST(ThermoFromYaml, IdealSolidSolnPhase)