diff --git a/requirements/test.txt b/requirements/test.txt
index 08ba964f22a44..93f00da1f101a 100644
--- a/requirements/test.txt
+++ b/requirements/test.txt
@@ -178,7 +178,6 @@ einops==0.8.1
     # via
     #   -r requirements/test.in
     #   encodec
-    #   mamba-ssm
     #   terratorch
     #   torchgeo
     #   vector-quantize-pytorch
@@ -418,8 +417,6 @@ lxml==5.3.0
     #   sacrebleu
 mako==1.3.10
     # via alembic
-mamba-ssm==2.2.5
-    # via -r requirements/test.in
 markdown==3.8.2
     # via mlflow
 markdown-it-py==3.0.0
@@ -476,8 +473,6 @@ networkx==3.2.1
     # via
     #   scikit-image
     #   torch
-ninja==1.11.1.3
-    # via mamba-ssm
 nltk==3.9.1
     # via rouge-score
 num2words==0.5.14
@@ -630,7 +625,6 @@ packaging==24.2
     #   lazy-loader
     #   lightning
     #   lightning-utilities
-    #   mamba-ssm
     #   matplotlib
     #   mlflow-skinny
     #   peft
@@ -974,7 +968,6 @@ sentencepiece==0.2.0
 setuptools==77.0.3
     # via
     #   lightning-utilities
-    #   mamba-ssm
     #   pytablewriter
     #   torch
     #   triton
@@ -1086,7 +1079,6 @@ torch==2.7.1+cu128
     #   lightly
     #   lightning
     #   lm-eval
-    #   mamba-ssm
     #   mteb
     #   open-clip-torch
     #   peft
@@ -1153,16 +1145,13 @@ transformers==4.55.0
     #   -r requirements/test.in
     #   genai-perf
     #   lm-eval
-    #   mamba-ssm
     #   peft
     #   sentence-transformers
     #   transformers-stream-generator
 transformers-stream-generator==0.0.5
     # via -r requirements/test.in
 triton==3.3.1
-    # via
-    #   mamba-ssm
-    #   torch
+    # via torch
 tritonclient==2.51.0
     # via
     #   -r requirements/test.in
diff --git a/tests/models/language/generation/test_hybrid.py b/tests/models/language/generation/test_hybrid.py
index 78d23c609fbee..584a3640eb92a 100644
--- a/tests/models/language/generation/test_hybrid.py
+++ b/tests/models/language/generation/test_hybrid.py
@@ -25,6 +25,7 @@ SSM_MODELS = [
 
 HYBRID_MODELS = [
     "ai21labs/Jamba-tiny-dev",
+    "pfnet/plamo-2-1b",
     "Zyphra/Zamba2-1.2B-instruct",
     "hmellor/tiny-random-BambaForCausalLM",
     "ibm-ai-platform/Bamba-9B-v1",